2024/06/19 更新

写真a

ヤマグチ カツノリ
山口 勉功
所属
理工学術院 創造理工学部
職名
教授
学位
博士(工学) ( 東北大学 )

経歴

  • 2017年04月
    -
    継続中

    早稲田大学   創造理工学部   教授

  • 2009年04月
    -
    継続中

    東京大学   生産技術研究所   客員教授

  • 2007年04月
    -
    2017年03月

    岩手大学   工学部   教授

  • 2005年04月
    -
    2009年03月

    東京大学生産技術研究所 研究員

  • 2000年07月
    -
    2007年03月

    岩手大学   工学部   助教授

  • 2005年
    -
     

    - Researcher

  • 1990年04月
    -
    2000年07月

    岩手大学   工学部   助手

  • 1989年04月
    -
    1990年03月

    東北大学   選鉱製錬研究所   助手

▼全件表示

学歴

  • 1986年04月
    -
    1989年03月

    東北大学大学院   工学研究科   金属工学専攻博士前期2年の課程  

  • 1982年04月
    -
    1986年03月

    岩手大学   工学部   金属工学科  

受賞

  • 技術賞

    2017年12月   環境資源工学会   手解体等の省力化を目指した使用済みモーターからのレアアースの回収  

    受賞者: 山口 勉功

  • 第1回 研究部門 優秀者賞

    2015年04月   岩手大学  

    受賞者: 山口 勉功

  • 論文賞

    2014年03月   資源・素材学会   1573KにおけるFeOx-SiO2系スラグの白金の溶解度  

    受賞者: 馬場啓充, 山口勉功

  • ゴールド賞

    2013年03月   TANAKAホールディングス(株)   ルテニウム含有銅合金におけるイリジウムの偏析挙動  

    受賞者: 山口 勉功

  • 資源・素材学会奨励賞

    2002年03月   資源・素材学会   新素材とリサイクルのプロセッシングに関する熱力学に基づいた平衡論的研究  

  • 資源・素材学会論文賞

    1999年03月   資源・素材学会   Fe-Cu-C系2液相分離による低品位スクラップからの銅の濃縮  

    受賞者: 山口勉功, 武田要一

  • 原田研究奨励賞

    1996年11月   財団法人金属研究助成会   Ⅲ-Ⅴ族化合物半導体材料の化学熱力学的研究  

▼全件表示

 

論文

  • Dynamics of reactions inhibiting epitaxial growth of Si(100) surfaces via interaction with hydrogen chloride

    Kunioshi Nilson, Fujimura Yoshiki, Fuwa Akio, Yamaguchi Katsunori

    COMPUTATIONAL MATERIALS SCIENCE   155   28 - 35  2018年12月  [査読有り]

    DOI

    Scopus

    6
    被引用数
    (Scopus)
  • Novel pathways for elimination of chlorine atoms from growing Si(100) surfaces in CVD reactors

    Nílson Kunioshi, Sho Hagino, Akio Fuwa, Katsunori Yamaguchi

    Applied Surface Science   441   773 - 779  2018年05月  [査読有り]

     概要を見る

    Reactions leading to elimination of chlorine atoms from growing Si(100) surfaces were simulated using clusters of silicon atoms of different sizes and shapes, and at the UB3LYP/6–31 g(d,p) level of theory. The reactions of type SiCl2(s) + 2 H2(g), where (s) indicates an adsorbed species at the surface and (g) a gas-phase species, were found to proceed in two steps: SiCl2(s) + H2(g) → SiHCl(s) + HCl(g) and SiHCl(s) + H2(g) → SiH2(s) + HCl(g), each having activation energies around 55 kcal/mol, a value which is comparable to experimental values published in the literature. In addition, the results suggested that H-passivation of Si(100) surfaces support reactions leading to canonical epitaxial growth, providing a plausible explanation for the convenience of passivating the surfaces prior to silicon deposition. The reactions analyzed here can therefore be seen as important steps in the mechanism of epitaxial growth of Si(100) surfaces.

    DOI

    Scopus

    6
    被引用数
    (Scopus)
  • 炭素共存下におけるFe-C合金とBi-Cu合金間の銅の分配

    関本 英弘, 恵茂田 大樹, 山口 勉功

    銅と銅合金 : 銅及び銅合金技術研究会誌 = Copper and copper alloy : journal of Japan Research Institute for Advanced Copper-Base Materials and Technologies   55 ( 1 ) 262 - 267  2016年  [査読有り]

    CiNii

  • Al2O3-CaO-SiO2-Cu2O 系スラグと溶銅間における白金族金属の分配比に及ぼすスラグ組成および酸素分圧の影響

    西嶋 和貴, 山口 勉功

    日本金属学会誌   78 ( 7 ) 267 - 273  2014年07月  [査読有り]

    DOI CiNii

    Scopus

    10
    被引用数
    (Scopus)
  • 酸化ホウ素をフラックスに用いたネオジム磁石のリサイクルプロセス開発

    関本 英弘, 久保 貴寛, 山口 勉功

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan   130 ( 10 ) 494 - 500  2014年  [査読有り]

     概要を見る

    In order to develop a new recycling process for neodymium permanent magnet generated in town, equilibrium relations between B2O3 slag, RExOy-B2O3 slag (RE = rare earths), and molten Fe-C alloy were experimentally investigated. When neodymium magnet was melted together with B2O3 and Fe-C alloy in graphite crucible, the sample was separated to 3 liquid phases of B2O3 slag, RExOy-B2O3 slag and molten Fe-C alloy. The concentration of RE in RExOy-B2O3 slag was increased with the decrease of the melting temperature, while that in B2O3 slag was increased with the decrease of the melting temperature. Cr, P, Ni, Co, and Cu were enriched in molten Fe-C alloy. Si and Al were enriched in B2O3 slag and RExOy-B2O3 slag. Utilizing such phenomena, a novel recycling process consisting of melting treatment with B2O3 and hydrometallurgical treatment using oxalic acid was proposed. The recovery rate of RE with the proposed process was over 99 %.

    DOI CiNii

  • Thermodynamic Assessment of MnO and FeO Activities in FeO-MnO-MgO-P2O5-SiO2(-CaO) Molten Slag (vol 53, pg 1325, 2013)

    Sun-Joong Kim, Jun Takekawa, Hiroyuki Shibata, Shin-ya Kitamura, Katsunori Yamaguchi, Youn-Bae Kang

    ISIJ INTERNATIONAL   54 ( 6 ) 1456 - 1456  2014年  [査読有り]

    DOI

    Scopus

  • 1573KにおけるFeOx-SiO_2系スラグの白金の溶解度

    馬場 啓充, 山口 勉功

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan   129 ( 5 ) 208 - 212  2013年05月  [査読有り]

     概要を見る

    There is an increasing trend in the copper smelters to recycle electronic materials, which contain relatively high concentration of platinum group metals. Platinum group metals lost in the slag is increasing with increasing of treated scrap amount. To determine the portion of the platinum group metals chemically dissolved in the slag will be a key factor to improve the recovery of those metals. An experimental study was carried out to determine the solubility of platinum in FeOx-SiO2 slag equilibrated with a pure platinum and the liquid Pt-Cu alloy at 1573 K and the range of oxygen partial pressure from 10-9 to 10-6. The solubility of platinum in the slag tends to increase with increasing oxygen partial pressure and content of copper in the slag. Based on the measured platinum solubility, activity coefficients of platinum oxide in the FeOx-SiO2 slag were derived. The activity coefficients decrease by increasing copper contents in slag. Therefore, lower copper content in the slag tend to lower precious metals dissolution in the slag.

    DOI CiNii

  • Thermodynamic Assessment of MnO and FeO Activities in FeO-MnO-MgO-P2O5-SiO2(CaO) Molten Slag

    Sun-Joong Kim, Jun Takekawa, Hiroyuki Shibata, Shin-ya Kitamura, Katsunori Yamaguchi, Youn-Bae Kang

    ISIJ INTERNATIONAL   53 ( 8 ) 1325 - 1333  2013年  [査読有り]

     概要を見る

    The activity coefficients of MnO and FeO in an FeO-MnO-MgO-P2O5-SiO2(-CaO) slag system were measured on the basis of the equilibrium between Ag and molten slag at 1 673 K under a controlled atmosphere. On the basis of experimental results, the activity coefficients of MnO and FeO in this multicomponent slag were evaluated using a regular solution (RS) model, FactSage, and an empirical formula. In the case of the RS model, the interaction energies and conversion factors to fit the calculated values to experimental results were reassessed. By the used of the empirical formula, FactSage and the regular solution model of present work, the activity coefficient ratio of MnS and FeS in a Fe-Mn-O-S matte that was equilibrated with a FeO-MnO-MgO-P2O5-SiO2 slag system was evaluated. When the RS model was used to calculate the gamma(MnO)/gamma(FeO) ratio, the gamma(MnS)/gamma(FeS) ratio decreased slightly with an increase in the X-MnS/X-FeS ratio. In contrast, when the empirical formula and FactSage were used, the gamma(MnS)/gamma(FeS) ratio was almost constant when the X-MnS/X-FeS ratio was increased.

    DOI

    Scopus

    12
    被引用数
    (Scopus)
  • Influence of Slag Basicity and Temperature on Fe and Mn Distribution between Liquid Fe-Mn-Ca-O-S Matte and Molten Slag

    Sun-Joong Kim, Jun Takekawa, Hiroyuki Shibata, Shin-ya Kitamura, Katsunori Yamaguchi

    ISIJ INTERNATIONAL   53 ( 10 ) 1715 - 1724  2013年  [査読有り]

     概要を見る

    We have proposed a novel process for recycling Mn wasted in steelmaking slag via sulfurization to separate P from Mn. For clarifying the efficient recovery of Mn from steelmaking slag, the influences of slag basicity and temperature on the distributions of Mn and Fe between the Fe-Mn-Ca-O-S matte and FeO-MnO-MgO-P2O5-SiO2-CaO slag were investigated. The distributions of Fe and Mn between the matte and the slag increased with an increase in the slag basicity. Moreover, when log P-S2 (P-S2: partial pressure of S) was more than -2, the Mn distribution increased to be more than 10 as the slag basicity increased beyond 1.7. Even though the effects of slag basicity and P-S2 on the Mn content in the matte were small, the behavior of Mn in the matte was dependent on temperature. In order to understand the behavior of Mn and Fe in steelmaking slag and matte, the relationship between the activity coefficient ratio of MnS and FeS (gamma(MnS)/gamma(FeS)) and the mole fraction ratio of MnS and FeS for the matte was investigated. To evaluate gamma(MnS)/gamma(FeS) for the matte, the activity coefficient ratio of MnO and FeO (gamma(MnO)/gamma(FeO)) was estimated using an empirical formula and the RS model, and the mole fractions of MnS and FeS in the matte were calculated on the basis of mass balance. The results revealed that the values of gamma(MnS)/gamma(FeS) for the Fe-Mn-S-O matte were about twice those for the Fe-Mn-Ca-S-O matte. Moreover, gamma(MnS)/gamma(FeS) for the Fe-Mn-Ca-S-O matte decreased with an increase in temperature.

    DOI

    Scopus

    5
    被引用数
    (Scopus)
  • Influence of Partial Pressure of Sulfur and Oxygen on Distribution of Fe and Mn between Liquid Fe-Mn Oxysulfide and Molten Slag

    Sun-Joong Kim, Hiroyuki Shibata, Jun Takekawa, Shin-Ya Kitamura, Katsunori Yamaguchi, Youn-Bae Kang

    METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE   43 ( 5 ) 1069 - 1077  2012年10月  [査読有り]

     概要を見る

    The authors proposed an innovative process for recovering Mn from steelmaking slag. The process starts with the sulfurization of steelmaking slag to separate P from Mn by the formation of a liquid sulfide phase (matte). Then, the obtained matte is weakly oxidized to make a Mn-rich oxide phase without P. High-purity Fe-Mn alloys can therefore be produced by the reduction of the Mn-rich oxide phase. However, to the authors' knowledge, the sulfurization of molten slag containing P and Mn has not been sufficiently investigated. It was recently found that P was not distributed to the matte in equilibrium with the molten slag. To gain knowledge of the process's development, it is important to investigate the influence of the partial pressures of sulfur and oxygen on the equilibrium distribution of Mn and Fe between the matte and the molten slag. In the current work, a mineralogical microstructure analysis of the matte revealed that the existence of the oxysulfide and metal phases was dependent on the partial pressure of sulfur and oxygen. The Mn content of the matte increased with partial pressure of sulfur while the O content of the matte decreased. In contrast, the ratio of Mn/Fe in the matte was constant when the metal phase of the matte was observed at a log below -11. These results also corresponded to the relationship between the activity coefficient ratio of MnS/FeS and the mole fraction of MnS/FeS in the matte. The gamma (MnS)/gamma (FeS) value decreased exponentially as the mole fraction of MnS/FeS increased.

    DOI

    Scopus

    13
    被引用数
    (Scopus)
  • Thermodynamic properties of lead oxide in a mixture of stainless steelmaking and nonferrous smelting slags

    Nobuhiro Maruoka, Shigeru Ueda, Hiroyuki Shibata, Katsunori Yamaguchi, Shin-Ya Kitamura

    High Temperature Materials and Processes   31 ( 3 ) 273 - 279  2012年06月  [査読有り]

     概要を見る

    In our previous paper, a slag modification process involving the mixing of stainless steelmaking and nonferrous smelting slags was proposed for preventing the disintegration of the stainless steelmaking slag. In order to use this method, the behavior of heavy metals especially PbO contained in the nonferrous slag has to be assessed. In the present study, the activity coefficient of PbO in CaOSiO 2- Fe tO-Al 2O 3-MgO and CaO-SiO 2-Fe tO slags saturated with iron was measured at 1673 K. The results showed that the activity coefficient of PbO increased with basicity and had a maximum value when the basicity was approximately 1.0. The equilibrium PbO content in the modified slag had a minimum value that corresponded to a mixing ratio of 0.6. The trend was similar to the change in the removal ratio of PbO observed in the previous study. Therefore, the change in the oxygen potential and the change in the activity coefficient of PbO can be considered the cause of this trend. © 2012 De Gruyter.

    DOI

    Scopus

  • High Temperature Enthalpy Measurement of SUS340 Stainless Steel

    Katsunori Yamaguchi, Shigeru Ueda

    HIGH TEMPERATURE MATERIALS AND PROCESSES   30 ( 6 ) 569 - 572  2012年01月  [査読有り]

     概要を見る

    High-temperature heat content of stainless steel of SUS304 was measured over the temperature range 600 to 1850 K using a drop-calorimeter. The enthalpy of fusion of SUS304 was determined as 230 +/- 0.18 J g(-1) at the liquidus point of 1719 +/- 3 K. The heat content and heat capacity equations were derived by Shomate function for the solid compounds and least square method for the liquid phase.

    DOI

  • Novel Recycling Process of Mn by Sulfurization of Molten Slag from a By-Product of Steelmaking Process

    Sun-Joong Kim, Hiroyuki Shibata, Nobuhiro Maruoka, Shinya Kitamura, Katsunori Yamaguchi

    HIGH TEMPERATURE MATERIALS AND PROCESSES   30 ( 4-5 ) 425 - 434  2011年08月  [査読有り]

     概要を見る

    We propose a novel process to recycle Mn from steelmaking slag. The first step is to sulfurize the slag, producing a liquid sulfide phase (matte) without P. High-purity Fe-Mn alloys can then be made by desulfurizing the matte. However, to our knowledge, there have been no reports to date concerning the sulfurization of P and Mn contained in molten slag. Therefore, knowledge of the distribution of Fe, Mn and P between the matte and the molten slag is required to determine the feasibility of this process. In this study, the equilibrium distributions of Mn, Fe, Ca and P between a FeS-MnS matte and FeO-MnO-SiO2-MgO-P2O5 slag with/without CaO are investigated under controlled partial pressures of oxygen and sulfur. It was found, as P is not present in the matte, that a separation of P from Mn was accomplished. The increament of (CaO+MgO)/SiO2 in slag can improve the concentrations of Mn and Fe in the matte. The content of Ca in the matte was less than 2 mass%, even when the concentration ratio of CaO/SiO2 in the slag was unity.

    DOI

    Scopus

    10
    被引用数
    (Scopus)
  • Lead Solubility in FeOx-CaO-SiO2-NaO0.5 and FeOx-CaO-SiO2-CrO1.5 Slags under Iron Saturation at 1573 K

    Dai Matsura, Shigeru Ueda, Katsunori Yamaguchi

    HIGH TEMPERATURE MATERIALS AND PROCESSES   30 ( 4-5 ) 441 - 446  2011年08月  [査読有り]

     概要を見る

    The sodium and chromium contents in copper or lead smelting slags are increasing with the increase in waste recycling. The lead solubility in the slag is important from both an economical and environmental perspective. As a fundamental study, experiments have been carried out to determine the equilibria between the FeOx-CaO-SiO2-5mass% NaO0.5 or FeOx-CaO-SiO2-5mass%CrO1.5 slags and lead metal in iron crucibles at 1573 K. It has been found that addition of soda decreases the lead solubility in SiO2 rich side of the slag, while soda increases the solubility in CaO rich side. Chromium in the slag decreases the lead solubility in the FeOx-CaO-SiO2 slag. The activity coefficients of PbO in the FeOx-CaO-SiO2-5mass%NaO0.5 or FeOx-CaO-SiO2-5mass%CrO1.5 slags were compared with those of the CaO-SiO2-FeOx ternary system.

    DOI

    Scopus

    4
    被引用数
    (Scopus)
  • Formation of CaSO4 in the CaO-FeOx-Cu2O Slags

    Sinichi Sato, Katsunori Yamaguchi

    HIGH TEMPERATURE MATERIALS AND PROCESSES   30 ( 4-5 ) 447 - 449  2011年08月  [査読有り]

     概要を見る

    Continuous converting of copper matte based on calcium ferrite slag of the CaO-FeOx-Cu2O system is an attractive technology for copper smelting This slag containing approximately 20 mass% CaO can prevent the excess magnetite precipitation, but sometimes tends to separate CaSO4 under a high oxygen potential required to produce copper metal.
    To clarify the mechanism of gypsum formation, the precipitation of CaSO4 in the CaO-FeOx-Cu2O slag system equilibrating with blister copper has been determined at 1473, 1523 and 1573 K under the SO2 partial pressures of 0.2, 0.4, 0.6 and 1 atm. It was found that the formation of CaSO4 in the CaO-FeOx-Cu2O slags is enhanced with decreasing temperature, increasing SO2 partial pressure or CaO content and also increasing oxidation degree of the blister copper. The behavior of CaSO4 formation in the slag is also discussed thermodynamically based on the free energy calculations combining with the activity data derived from Prof. Takeda's data on the CaO-FeOx-Cu2O ferrite slag diagram. Both of experimental and thermodynamical results show good agreements in general.
    It is found that the decreasing temperature, increasing CaO content or SO2 pressure, and extensive oxidation of the blister copper tend to separate CaSO4.

    DOI

    Scopus

    1
    被引用数
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  • Distributions of Sn, Sb, and Bi between Ag-Pb Alloy and PbO Based Melt at 1273 K

    Shigeru Ueda, Ryo Katsube, Katsunori Yamaguchi

    MATERIALS TRANSACTIONS   50 ( 7 ) 1820 - 1823  2009年07月  [査読有り]

     概要を見る

    Distributions of Sn, Sb, and Bi between Ag-Pb alloy and PbO based melt were investigated at 1273 K. A chemical equilibrium technique was used in order to measure the distributions. The oxygen partial pressure equilibrated with the melts was measured by an EMF method. The distribution ratios were defined as the weight ratios of Sn, Sb, and Bi in PbO divided by those in the Ag-Pb phase. The obtained distribution ratios were plotted against the logarithm of the oxygen partial pressure. The plots showed that the distribution ratios of Sn, Sb, and Bi increased with an increase in the oxygen partial pressure. Taking the slope of these plots, the oxide forms of the minor elements dissolved in the PbO based melt could be estimated. Sn dissolves in PbO based melts as SnO2 in the oxygen partial pressure range, P-O2 = 10(-7.5)-10(-4). Depend on the concentration of Sn in PbO and that in Ag, the activity coefficient of SnO2 in the PbO based melt at 1273 K was determined to be 62,000. The activity coefficient of BiO1.5 decreases with increasing oxygen partial pressure and that of SbO1.5 increases with increasing oxygen partial pressure. The distribution behavior of such minor elements was compared with that of Ag, and the efficiency of oxidation in the removal of such impurities from Ag was investigated. [doi: 10.2320/matertrans.M2009117]

    DOI

    Scopus

    1
    被引用数
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  • Activity Coefficient of AgO0.5 in PbO-NaO0.5 and PbO-CaO Melts at 1273 K

    Shigeru Ueda, Tomomasa Kumagai, Katsunori Yamaguchi

    MATERIALS TRANSACTIONS   50 ( 6 ) 1457 - 1461  2009年06月  [査読有り]

     概要を見る

    The equilibration of a Ag-Pb-based melt with PbO-NaO0.5 and PbO-CaO melts at 1273 K was investigated. A chemical equilibrium technique was used to carry out measurements. The oxygen partial pressure was measured by an electromotive force (EMF) method. The activity coefficient of AgO0.5 in the PbO-NaO0.5 and PbO-CaO melts and that of PbO in the PbO-NaO0.5 melt was derived. The addition of NaO0.5 to the PbO-based melt resulted in a slight decrease in the activity coefficient of AgO0.5. However, the activity coefficient of PbO decreased remarkably with an increase in the concentration of NaO0.5 in the PbO-based melt. Therefore, improved phase separation of Ag from the PbO-based melt was achieved by the addition NaO0.5. The addition of CaO in the PbO-based melt did not cause any change in the activity coefficient of AgO0.5. [doi:10.2320/matertrans.M2009036]

    DOI

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  • Formation of CaCl2 and CaF2 from CaSO4 and Plastics Containing Halogen Element

    Shigeru Ueda, Yuuki Hatakeyama, Koji Uotani, Katsunori Yamaguchi, Takahiro Okura

    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN   95 ( 5 ) 387 - 392  2009年05月  [査読有り]

     概要を見る

    Waste gypsum from construction materials have to be recycled legally in Japan.
    Combustion of plastics containing halogen may generate halide gas. Stabilization treatment of halogen element should be done. In the present study the reaction between the plastics and gypsum generating calcium halide Such as CaCl2 or CaF2 had been investigated. Reaction condition was evaluated thermodynamically, and experiment for generating CaCl2 and CaF2 was conducted. CaCl2 was formed from CaSO4 and chloroethylene at 1273K. CaF2 was formed over 1173K. Crystal water of CaSO4 accelerates the reaction Forming CaF2.

    DOI

    Scopus

  • Thermodynamic Properties of Selenium in Ag-Pb Alloy and Lead Oxide Phases at 1273 K

    Shigeru Ueda, Ryo Katsube, Katsunori Yamaguchi

    MATERIALS TRANSACTIONS   50 ( 5 ) 1148 - 1151  2009年05月  [査読有り]

     概要を見る

    The distribution ratio of Se between Ag-Pb alloy and PbO phases was investigated at 1273 K. A chemical equilibrium technique was used for the measurement. The oxygen partial pressure was in equilibrium with both the phases, and it was measured by an EMF method. The distribution ratio, defined as the mole fraction of Se in PbO to the mole fraction of Se in metal, was plotted against the oxygen partial pressure. The distribution ratio decreased with an increase in the oxygen partial pressure. The slope of the plot indicates that Se dissolves in the PbO phase as oxide, which is unreasonable. The activity coefficient of Se in the Ag-Pb alloy was also measured, and it was found to decrease with an increase in the concentration of Ag. Se dissolved in the PbO phase in the non-oxide form. The activity coefficient of Se in Ag was estimated as 0.0009 at 1273 K. [doi: 10.2320/matertrans.M2009021]

    DOI

    Scopus

    1
    被引用数
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  • ハロゲン含有プラスチックと石膏の反応によるCaCl2およびCaF2の生成

    植田 滋, 畠山 祐樹, 魚谷 浩司, 山口 勉功, 大藏 隆彦

    鉄と鋼   95 ( 5 ) 387 - 392  2009年

     概要を見る

    Waste gypsum from construction materials have to be recycled legally in Japan.<br>Combustion of plastics containing halogen may generate halide gas. Stabilization treatment of halogen element should be done. In the present study, the reaction between the plastics and gypsum generating calcium halide such as CaCl<sub>2</sub> or CaF<sub>2</sub> had been investigated. Reaction condition was evaluated thermodynamically, and experiment for generating CaCl<sub>2</sub> and CaF<sub>2</sub> was conducted. CaCl<sub>2</sub> was formed from CaSO<sub>4</sub> and chloroethylene at 1273K. CaF<sub>2</sub> was formed over 1173K. Crystal water of CaSO<sub>4</sub> accelerates the reaction forming CaF<sub>2</sub>.

    CiNii

  • ハロゲン含有プラスチックと石膏の反応によるCaCl2およびCaF2の生成

    植田 滋, 畠山 祐樹, 魚谷 浩司, 山口 勉功, 大藏 隆彦

    鉄と鋼   95 ( 5 ) 387 - 392  2009年  [査読有り]

    CiNii

  • ポリエチレンによる石膏の高温還元の反応過程

    魚谷 浩司, 植田 滋, 山口 勉功, 大蔵 隆彦

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan   124 ( 10 ) 659 - 662  2008年11月

     概要を見る

    Most of waste plaster board, which contains gypsum has been buried in the landfill. However, this treatment of waste gypsum board is becoming a serious problem due to lack of landfill capacity, and secondary pollution by toxic substance. In this study, we focused a recycle of calcium resources as CaO or CaS from the waste gypsum, and developed a reduction process of the gypsum using plastics at high temperature. Reduction behavior of CaSO<SUB>4</SUB> by Polyethylene at temperature from 1273 to 1573K was studied with gravimetry and X-ray diffraction analysis. From the experimental results, we found that increasing CaSO<SUB>4</SUB>-CH<SUB>2</SUB> gas interface tend to advance the reduction of CaSO<SUB>4</SUB>. Furthermore, direct formation of CaS from CaSO<SUB>4</SUB> was observed only at temperature of 1273K without an intermediate compounds stage, and the reduction sequence was CaSO<SUB>4</SUB>→CaO→CaS at temperatures higher than 1373K. Finally, the sequence of reduction process for CaSO<SUB>4</SUB> was discussed on the potential diagram of the Ca-S<SUB>2</SUB>-O<SUB>2</SUB> system.

    DOI CiNii

  • ポリエチレンによる石膏の高温還元の反応過程

    魚谷 浩司, 植田 滋, 山口 勉功, 大蔵 隆彦

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan   124 ( 10 ) 659 - 662  2008年11月  [査読有り]

     概要を見る

    Most of waste plaster board, which contains gypsum has been buried in the landfill. However, this treatment of waste gypsum board is becoming a serious problem due to lack of landfill capacity, and secondary pollution by toxic substance. In this study, we focused a recycle of calcium resources as CaO or CaS from the waste gypsum, and developed a reduction process of the gypsum using plastics at high temperature. Reduction behavior of CaSO4 by Polyethylene at temperature from 1273 to 1573K was studied with gravimetry and X-ray diffraction analysis. From the experimental results, we found that increasing CaSO4-CH2 gas interface tend to advance the reduction of CaSO4. Furthermore, direct formation of CaS from CaSO4 was observed only at temperature of 1273K without an intermediate compounds stage, and the reduction sequence was CaSO4→CaO→CaS at temperatures higher than 1373K. Finally, the sequence of reduction process for CaSO4 was discussed on the potential diagram of the Ca-S2-O2 system.

    DOI CiNii

  • Distribution of Cobalt between MgO-Saturated FeOx-MgO-CaO-SiO2 Slag and Fe-Cu-Co Molten Alloy

    Shin-ya Kitamura, Hideki Kuriyama, Nobuhiro Maruoka, Katsunori Yamaguchi, Akira Hasegawa

    MATERIALS TRANSACTIONS   49 ( 11 ) 2636 - 2641  2008年11月  [査読有り]

     概要を見る

    During the decommissioning phase of a nuclear reactor, most of the steel-reinforced concrete shielding around a pressure vessel is considered as low-level radioactive waste. It is highly desirable to reduce the radioactivity level of this waste to below the clearance level. Normally, the radioactivity of steel after irradiation is found to be proportional to the cobalt content. In this study, for the production of low-activation steel in steelmaking process, cobalt distribution between MgO-saturated FeOx-MgO-CaO-SiO, slag and Fe-Cu-Co molten alloy was investigated. The results are summarized as follows: (1) the distribution ratio increases with decreasing temperature and (2) the activity coefficient of CoO decreases with increasing temperature and decreasing slag basicity. Although low temperature and low basicity are suitable conditions for refining, it is extremely difficult to decrease the Co content by an oxidation reaction, because of a very small distribution ratio of cobalt. [doi:10.2320/matertrans.MAW200831]

    DOI

    Scopus

    5
    被引用数
    (Scopus)
  • Growth kinetics of intermediate phase layers in an early stage of hot dip galvanizing at 450 degrees C

    Shigeru Ueda, Osamu Taguchi, Yoshiaki Iijima, Gou Takahashi, Katsunori Yamaguchi

    JOURNAL OF MATERIALS SCIENCE   43 ( 16 ) 5666 - 5668  2008年08月  [査読有り]

    DOI

    Scopus

    14
    被引用数
    (Scopus)
  • Activity coefficient of strontium in liquid copper and the standard free energy of formation for SrO center dot 6Al(2)O(3) and SrO center dot 2Al(2)O(3)

    Shigeru Ueda, Keita Utagawa, Katsunori Yamaguchi

    MATERIALS TRANSACTIONS   49 ( 6 ) 1338 - 1341  2008年06月  [査読有り]

     概要を見る

    The activity coefficient of strontium in a copper melt has been investigated by a chemical equilibrium technique in the temperature range from 1473 to 1773 K. A graphite crucible was used to control the oxygen partial pursuer in CO gas. The activity coefficient was derived from the standard free energy of formation of SrO, the oxygen partial pressure, and the concentration of strontium in copper.
    The standard free energies of formation for Sr0.6Al2O3 and Sr0.2Al2O3 at 1723 K are also derived by equilibrating Al2O3, SrO center dot 6Al(2)O(3), and SrO center dot 2Al(2)O(3) with Cu.

    DOI

    Scopus

    2
    被引用数
    (Scopus)
  • Thermodynamic investigation of the Cu-Zr system

    Katsunori Yamaguchi, Young-Cheol Song, Toshiaki Yoshida, Kimio Itagaki

    JOURNAL OF ALLOYS AND COMPOUNDS   452 ( 1 ) 73 - 79  2008年03月  [査読有り]

     概要を見る

    High temperature heat contents of the Cu-Zr system alloys were measured over temperature range from 880 to 1470 K using a drop calorimeter. The enthalpies of fusion of some solid compounds were determined by the heat content-temperature plots and the entropies of fusion were calculated. Enthalpies of mixing in the liquid Cu-Zr system were measured by high temperature reaction calorimetry in the concentration range of x(Zr) = 0.182-0.667 at 1443 K. This system has negative enthalpies of mixing over the measured concentration range. The standard enthalpies of formation at 298.15 K of Cu9Zr2, Cu51Zr14, Cu8Zr3, Cu10Zr7 and CuZr2 compounds were determined from the obtained data for the heat contents and enthalpies of mixing. Based on the experimental data, published thermodynamic and phase diagram data, the Cu-Zr binary system was analyzed using Redlich-Kister polynomial equation. The thermodynamic properties and the phase diagram calculated from the optimized parameters agree well with the experimental data. (C) 2007 Elsevier B.V. All rights reserved.

    DOI

    Scopus

    49
    被引用数
    (Scopus)
  • Phase equilibrium and activities of Fe-S-O melts

    Shigeru Ueda, Katsunori Yamaguchi, Yoichi Takeda

    MATERIALS TRANSACTIONS   49 ( 3 ) 572 - 578  2008年03月  [査読有り]

     概要を見る

    Phase equilibrium and oxygen partial pressure for the Fe-S-O system from eutectic temperature to 1673 K were investigated by chemical equilibrium techniques and the EMF method. The liquid phase is saturated with Fe, FeO, Fe3O4 and FeS. The partial pressure of oxygen increases remarkably with departing from the liquidus saturated with Fe. According to the Gibbs-Duhem equation and Schumann's method, the activities of Fe and the partial pressure of S-2 for the liquid phase are derived.

    DOI

    Scopus

    13
    被引用数
    (Scopus)
  • Activity coefficient of AgO0.5 in the PbO-SiO2 melt at 1273 K

    Shigeru Ueda, Tomomasa Kumagai, Katsunori Yamaguchi

    MATERIALS TRANSACTIONS   48 ( 6 ) 1458 - 1462  2007年06月  [査読有り]

     概要を見る

    Activity coefficient of AgO0.5 in PbO-SiO2 melt equilibrated with Ag-Pb alloy in an alumina or a magnesia crucible was investigated at 1273 K. A chemical equilibrium technique was applied to the measurement. The oxygen partial pressure was also measured by an EMF method. The activity coefficient of AgO0.5 in the PbO-SiO2 melt was derived.
    The addition Of SiO2 in the PbO melt decreases dissolution of Ag into the oxide phases. However, the activity coefficient of AgO0.5 increases slightly with an increase in the concentration of SiO2 in the PbO melt.

    DOI

    Scopus

    6
    被引用数
    (Scopus)
  • プラスチックを用いた石膏からのCaO及びCaSの生成

    植田 滋, 畠山 祐樹, 山口 勉功, 中村 公, 大藏 隆彦

    資源と素材 : 資源・素材学会誌   122 ( 9 ) 456 - 461  2006年10月

     概要を見る

    Waste gypsum from construction materials have to be recycled legally in Japan. The waste gypsum contains CaSO<SUB>4</SUB> and other materials such as papers. And thus it is impossible to reuse them directly as a CaSO<SUB>4</SUB> resource. A treatment at higher reaction temperature seems to be suitable for recycling a large quantity of the gypsum. However, CaSO<SUB>4</SUB> is rather stable even at high temperature, therefore cost-intensive reactants are necessary.<BR>Re-generation of CaO or CaS from CaSO<SUB>4</SUB> was investigated using waste plastics, which were considered as reduction agent. Thermodynamic simulation was employed to find optimal conditions for reduction of CaSO<SUB>4</SUB>. Reduction experiments were conducted using reagents of CaSO<SUB>4</SUB> and polyethylene. CaO was formed from CaSO<SUB>4</SUB> and polyethylene mixture over 1273K in air. Crystal water of CaSO<SUB>4</SUB> accelerates the reaction forming CaO. Plastics can be successfully used to produce CaO and CaS from CaSO<SUB>4</SUB> in controlled atmosphere.

    DOI CiNii

  • プラスチックを用いた石膏からのCaO及びCaSの生成

    植田 滋, 畠山 祐樹, 山口 勉功, 中村 公, 大藏 隆彦

    資源と素材 : 資源・素材学会誌   122 ( 9 ) 456 - 461  2006年10月  [査読有り]

     概要を見る

    Waste gypsum from construction materials have to be recycled legally in Japan. The waste gypsum contains CaSO4 and other materials such as papers. And thus it is impossible to reuse them directly as a CaSO4 resource. A treatment at higher reaction temperature seems to be suitable for recycling a large quantity of the gypsum. However, CaSO4 is rather stable even at high temperature, therefore cost-intensive reactants are necessary.<BR>Re-generation of CaO or CaS from CaSO4 was investigated using waste plastics, which were considered as reduction agent. Thermodynamic simulation was employed to find optimal conditions for reduction of CaSO4. Reduction experiments were conducted using reagents of CaSO4 and polyethylene. CaO was formed from CaSO4 and polyethylene mixture over 1273K in air. Crystal water of CaSO4 accelerates the reaction forming CaO. Plastics can be successfully used to produce CaO and CaS from CaSO4 in controlled atmosphere.

    DOI CiNii

  • Copper enrichment of iron-base alloy scraps by phase separation in liquid Fe-Cu-P and Fe-Cu-P-C systems

    Katsunori Yamaguchi, Takuya Ohara, Shigeru Ueda, Yoichi Takeda

    MATERIALS TRANSACTIONS   47 ( 7 ) 1864 - 1868  2006年07月  [査読有り]

     概要を見る

    A clear phase separation into liquid iron-rich and copper-rich alloys was observed when a mixture of Fe, Cu and P was melted in an alumina or carbon crucible at 1373 K. Since this phase separation is considered to be useful for recovering valuable copper from iron-base alloy scraps, the phase equilibrium in the Fe-Cu-P and Fe-Cu-P-C systems was investigated in this study. The effect of carbon to the phase separation was determined in the concentration range of phosphorous between 7 and 11 mass% at 1373 K. It was found that the addition of carbon enlarged the miscibility gap of the Fe-Cu-P system. Distribution ratios of some minor elements of An, Ag, Pd, Pt, Rh, Cr, Mn and Ni between the liquid iron-rich and copper rich phases were also measured at 1373 K. It was found that An, Ag and Pd were enriched in the copper-rich phase, while Pt and Mn were distributed in both phases, and Rh, Cr and Ni preferentially in the iron-rich phase.

    DOI

    Scopus

    11
    被引用数
    (Scopus)
  • Liquidus relations of calcium ferrite and ferrous calcium silicate slag in continuous copper converting

    Florian Kongoli, Ian McBow, Akira Yazawa, Yoichi Takeda, Katsunori Yamaguchi, Robert Budd, S. Llubani

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 1     69 - +  2006年  [査読有り]

     概要を見る

    While calcium ferrite slags have been successfully used in continuous copper converting for the last 30 years, ferrous calcium silicate slag was proposed about 8 years ago as an additional alternative for copper smelting. Although both slags are normal extensions of each other their phase relations have not been completely clarified. In this paper the liquidus relations of both slags have been quantified at various areas that cover both of them.
    The existing experimental data have been first reviewed and discussed in relation to the solidification procedure. An original physical model is then used to predict various diagrams of the liquidus surface of both slags.
    It is shown that the ternary liquidus diagrams normally used for FeOx-SiO2-CaO system are not suitable for industrial slags. The new model diagrams of Fe/CaO versus SiO2 and Fe/SiO2 versus CaO as well as Fe/CaO versus Temperature and Fe/SiO2 versus temperature are proven to be much more convenient for ferrite and ferrous calcium silicate slags. Based on these diagrams the effect Of SiO2 and CaO on the melting temperature is quantified.
    The effect Of CU2O is also quantified through the model. Some Fe/CaO versus CU(2)o and Fe/SiO2 versus CaO at various copper contents are predicted and the results show good agreement with the experimental data. It is also shown that in the presence of liquid copper, CU2O is dissolved in the slag depending on the oxidation degree of the system and might lower the liquidus temperature.
    Some discussions are also presented taking into account plant observations and important conclusions are drawn for copper smelting and converting
    If the ferrous calcium silicate slags and the so called "fayalite" slag are looked as continuation of each other it can be seen that lime at the start increases the liquidus temperature in the magnetite field but decreases it if higher lime is added and we get closer to the ferrous calcium silicate slag. It should be noted that these conclusions should not be generalized since different conditions in various furnaces and various minor oxides such as alumina and magnesia may completely change the above stated relationships.
    It also should be kept in mind that in the industrial practice the liquidus surface is important along with other factors such as slag volume, refractory protection, copper metal recovery, OF blister composition etc. and these factors need to be taken all into consideration when a proper slag composition is chosen. These are subject of the author's previous and continuous research.

  • Liquidus relations of calcium ferrite and ferrous calcium silicate slag in continuous copper converting

    Florian Kongoli, Ian McBow, Akira Yazawa, Yoichi Takeda, Katsunori Yamaguchi, Robert Budd, S. Llubani

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 3     69 - +  2006年  [査読有り]

     概要を見る

    While calcium ferrite slags have been successfully used in continuous copper converting for the last 30 years, ferrous calcium silicate slag was proposed about 8 years ago as an additional alternative for copper smelting. Although both slags are normal extensions of each other their phase relations have not been completely clarified. In this paper the liquidus relations of both slags have been quantified at various areas that cover both of them.
    The existing experimental data have been first reviewed and discussed in relation to the solidification procedure. An original physical model is then used to predict various diagrams of the liquidus surface of both slags.
    It is shown that the ternary liquidus diagrams normally used for FeOx-SiO2-CaO system are not suitable for industrial slags. The new model diagrams of Fe/CaO versus SiO2 and Fe/SiO2 versus CaO as well as Fe/CaO versus Temperature and Fe/SiO2 versus temperature are proven to be much more convenient for ferrite and ferrous calcium silicate slags. Based on these diagrams the effect of SiO2 and CaO on the melting temperature is quantified.
    The effect of Cu2O is also quantified through the model. Some Fe/CaO versus Cu2O and Fe/SiO2 versus CaO at various copper contents are predicted and the results show good agreement with the experimental data. It is also shown that in the presence of liquid copper, Cu2O is dissolved in the slag depending on the oxidation degree of the system and might lower the liquidus temperature.
    Some discussions are also presented taking into account plant observations and important conclusions are drawn for copper smelting and converting.
    If the ferrous calcium silicate slags and the so called "fayalite" slag are looked as continuation of each other it can be seen that lime at the start increases the liquidus temperature in the magnetite field but decreases it if higher lime is added and we get closer to the ferrous calcium silicate slag.
    It should be noted that these conclusions should not be generalized since different conditions in various furnaces and various minor oxides such as alumina and magnesia may completely change the above stated relationships.
    It also should be kept in mind that in the industrial practice the liquidus surface is important along with other factors such as slag volume, refractory protection, copper metal recovery, blister composition etc. and these factors need to be taken all into consideration when a proper slag composition is chosen. These are subject of the author's previous and continuous research.

  • Liquidus relations of calcium ferrite and ferrous calcium silicate slag in continuous copper converting

    Florian Kongoli, Ian McBow, Akira Yazawa, Yoichi Takeda, Katsunori Yamaguchi, Robert Budd, S. Llubani

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 4     69 - 87  2006年  [査読有り]

     概要を見る

    While calcium ferrite slags have been successfully used in continuous copper converting for the last 30 years, ferrous calcium silicate slag was proposed about 8 years ago as an additional alternative for copper smelting. Although both slags are normal extensions of each other their phase relations have not been completely clarified. In this paper the liquidus relations of both slags have been quantified at various areas that cover both of them.
    The existing experimental data have been first reviewed and discussed in relation to the solidification procedure. An original physical model is then used to predict various diagrams of the liquidus surface of both slags.
    It is shown that the ternary liquidus diagrams normally used for FeOx-SiO2-CaO system are not suitable for industrial slags. The new model diagrams of Fe/CaO versus SiO2 and Fe/SiO2 versus CaO as well as Fe/CaO versus Temperature and Fe/SiO2 versus temperature are proven to be much more convenient for ferrite and ferrous calcium silicate slags. Based on these diagrams the effect of SiO2 and CaO on the melting temperature is quantified.
    The effect Of Cu2O is also quantified through the model. Some Fe/CaO versus Cu2O and Fe/SiO2 versus CaO at various copper contents are predicted and the results show good agreement with the experimental data. It is also shown that in the presence of liquid copper, Cu2O is dissolved in the slag depending on the oxidation degree of the system and might lower the liquidus temperature.
    Some discussions are also presented taking into account plant observations and important conclusions are drawn for copper smelting and converting.

  • Liquidus relations of calcium ferrite and ferrous calcium silicate slag in continuous copper converting

    Florian Kongoli, Ian McBow, Akira Yazawa, Yoichi Takeda, Katsunori Yamaguchi, Robert Budd, S. Llubani

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 5     69 - 87  2006年  [査読有り]

     概要を見る

    While calcium ferrite slags have been successfully used in continuous copper converting for the last 30 years, ferrous calcium silicate slag was proposed about 8 years ago as an additional alternative for copper smelting. Although both slags are normal extensions of each other their phase relations have not been completely clarified. In this paper the liquidus relations of both slags have been quantified at various areas that cover both of them.
    The existing experimental data have been first reviewed and discussed in relation to the solidification procedure. An original physical model is then used to predict various diagrams of the liquidus surface of both slags.
    It is shown that the ternary liquidus diagrams normally used for FeOx-SiO2-CaO system are not suitable for industrial slags. The new model diagrams of Fe/CaO versus SiO2 and Fe/SiO2 versus CaO as well as Fe/CaO versus Temperature and Fe/SiO2 versus temperature are proven to be much more convenient for ferrite and ferrous calcium silicate slags. Based on these diagrams the effect Of SiO2 and CaO on the melting temperature is quantified.
    The effect of Cu2O is also quantified through the model. Some Fe/CaO versus Cu2O and Fe/SiO2 versus CaO at various copper contents are predicted and the results show good agreement with the experimental data. It is also shown that in the presence of liquid copper, CU2O is dissolved in the slag depending on the oxidation degree of the system and might lower the liquidus temperature.
    Some discussions are also presented taking into account plant observations and important conclusions are drawn for copper smelting and converting.

  • Liquidus relations of calcium ferrite and ferrous calcium silicate slag in continuous copper converting

    Florian Kongoli, Ian McBow, Akira Yazawa, Yoichi Takeda, Katsunori Yamaguchi, Robert Budd, S. Llubani

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 6     69 - 87  2006年  [査読有り]

     概要を見る

    While calcium ferrite slags have been successfully used in continuous copper converting for the last 30 years, ferrous calcium silicate slag was proposed about 8 years ago as an additional alternative for copper smelting. Although both slags are normal extensions of each other their phase relations have not been completely clarified. In this paper the liquidus relations of both slags have been quantified at various areas that cover both of them.
    The existing experimental data have been first reviewed and discussed in relation to the solidification procedure. An original physical model is then used to predict various diagrams of the liquidus surface of both slags.
    It is shown that the ternary liquidus diagrams normally used for FeOx-SiO2-CaO system are not suitable for industrial slags. The new model diagrams of Fe/CaO versus SiO2 and Fe/SiO2 versus CaO as well as Fe/CaO versus Temperature and Fe/SiO2 versus temperature are proven to be much more convenient for ferrite and ferrous calcium silicate slags. Based on these diagrams the effect Of SiO2 and CaO on the melting temperature is quantified.
    The effect of Cu2O is also quantified through the model. Some Fe/CaO versus Cu2O and Fe/SiO2 versus CaO at various copper contents are predicted and the results show good agreement with the experimental data. It is also shown that in the presence of liquid copper, CU2O is dissolved in the slag depending on the oxidation degree of the system and might lower the liquidus temperature.
    Some discussions are also presented taking into account plant observations and important conclusions are drawn for copper smelting and converting.

  • Liquidus relations of calcium ferrite and ferrous calcium silicate slag in continuous copper converting

    Florian Kongoli, Ian McBow, Akira Yazawa, Yoichi Takeda, Katsunori Yamaguchi, Robert Budd, S. Llubani

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 7     69 - +  2006年  [査読有り]

     概要を見る

    While calcium ferrite slags have been successfully used in continuous copper converting for the last 30 years, ferrous calcium silicate slag was proposed about 8 years ago as an additional alternative for copper smelting. Although both slags are normal extensions of each other their phase relations have not been completely clarified. In this paper the liquidus relations of both slags have been quantified at various areas that cover both of them.
    The existing experimental data have been first reviewed and discussed in relation to the solidification procedure. An original physical model is then used to predict various diagrams of the liquidus surface of both slags.
    It is shown that the ternary liquidus diagrams normally used for FeOX-SiO2-CaO system are not suitable for industrial slags. The new model diagrams of Fe/CaO versus SiO2 and Fe/SiO2 versus CaO as well as Fe/CaO versus Temperature and Fe/SiO2 versus temperature are proven to be much more convenient for ferrite and ferrous calcium silicate slags. Based on these diagrams the effect of SiO2 and CaO on the mclting temperature is quantified.
    The effect of Cu2O is also quantified through the model. Some Fe/CaO versus Cu2O and Fe/SiO2 versus CaO at various copper contents are predicted and the results show good agreement with the experimental data. It is also shown that in the presence of liquid copper, Cu2O is dissolved in the slag depending on the oxidation degree of the system and might lower the liquidus temperature.
    Some discussions are also presented taking into account plant observations and important conclusions are drawn for copper smelting and converting

  • Liquidus relations of calcium ferrite and ferrous calcium silicate slag in continuous copper converting

    Florian Kongoli, Ian McBow, Akira Yazawa, Yoichi Takeda, Katsunori Yamaguchi, Robert Budd, S. Llubani

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 8     69 - +  2006年  [査読有り]

     概要を見る

    While calcium ferrite slags have been successfully used in continuous copper converting for the last 30 years, ferrous calcium silicate slag was proposed about 8 years ago as an additional alternative for copper smelting. Although both slags are normal extensions of each other their phase relations have not been completely clarified. In this paper the liquidus relations of both slags have been quantified at various areas that cover both of them.
    The existing experimental data have been first reviewed and discussed in relation to the solidification procedure. An original physical model is then used to predict various diagrams of the liquidus surface of both slags.
    It is shown that the ternary liquidus diagrams normally used for FeOx-SiO2-CaO system are not suitable for industrial slags. The new model diagrams of Fe/CaO versus SiO2 and FE/SiO2 versus CaO as well as Fe/CaO versus Temperature and Fe/SiO2 versus temperature are proven to be much more convenient for ferrite and ferrous calcium silicate slags. Based on these diagrams the effect Of SiO2 and CaO on the melting temperature is quantified.
    The effect Of CU2O is also quantified through the model. Some Fe/CaO versus CU2O and Fe/SiO2 versus CaO at various copper contents are predicted and the results show good agreement with the experimental data. It is also shown that in the presence of liquid copper, Cu2O is dissolved in the slag depending on the oxidation degree of the system and might lower the liquidus temperature.
    Some discussions are also presented taking into account plant observations and important conclusions are drawn for copper smelting and converting.
    If the ferrous calcium silicate slags and the so called "fayalite" slag are looked as continuation of each other it can be seen that lime at the start increases the liquidus temperature in the magnetite field but decreases it if higher lime is added and we get closer to the ferrous calcium silicate slag.
    It should be noted that these conclusions should not be generalized since different conditions in various furnaces and various minor oxides such as alumina and magnesia may completely change the above stated relationships.
    It also should be kept in mind that in the industrial practice the liquidus surface is important along with other factors such as slag volume, refractory protection, copper metal recovery, blister composition etc. and these factors need to be taken all into consideration when a proper slag composition is chosen. These are subject of the author's previous and continuous research.

  • Liquidus relations of calcium ferrite and ferrous calcium silicate slag in continuous copper converting

    Florian Kongoli, Ian McBow, Akira Yazawa, Yoichi Takeda, Katsunori Yamaguchi, Robert Budd, S. Llubani

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 9     69 - +  2006年  [査読有り]

     概要を見る

    While calcium ferrite slags have been successfully used in continuous copper converting for the last 30 years, ferrous calcium silicate slag was proposed about 8 years ago as an additional alternative for copper smelting. Although both slags are normal extensions of each other their phase relations have not been completely clarified. In this paper the liquidus relations of both slags have been quantified at various areas that cover both of them.
    The existing experimental data have been first reviewed and discussed in relation to the solidification procedure. An original physical model is then used to predict various diagrams of the liquidus surface of both slags.
    It is shown that the ternary liquidus diagrams normally used for FeOx-SiO2-CaO system are not suitable for industrial slags. The new model diagrams of Fe/CaO versus SiO2 and Fe/SiO2 versus CaO as well as Fe/CaO versus Temperature and Fe/SiO2 versus temperature are proven to be much more convenient for ferrite and ferrous calcium silicate slags. Based on these diagrams the effect of SiO2 and CaO on the melting temperature is quantified.
    The effect of Cu2O is also quantified through the model. Some Fe/CaO versus Cu2O and Fe/SiO2 versus CaO at various copper contents are predicted and the results show good agreement with the experimental data. It is also shown that in the presence of liquid copper, Cu2O is dissolved in the slag depending on the oxidation degree of the system and might lower the liquidus temperature.
    If the ferrous calcium silicate slags and the so called "fayalite" slag are looked as continuation of each other it can be seen that lime at the start increases the liquidus temperature in the magnetite field but decreases it if higher lime is added and we get closer to the ferrous calcium silicate slag.
    It should be noted that these conclusions should not be generalized since different conditions in various furnaces and various minor oxides such as alumina and magnesia may completely change the above stated relationships.
    It also should be kept in mind that in the industrial practice the liquidus surface is important along with other factors such as slag volume, refractory protection, copper metal recovery, blister composition etc. and these factors need to be taken all into consideration when a proper slag composition is chosen. These are subject of the author's previous and continuous research.

  • Activities of lead and zinc oxides in CaO-SiO2-FeOx-AlO1.5 slag

    Katsunori Yamaguchi, Masami Kudo, Yusuke Kimura, Shigeru Ueda, Yoichi Takeda

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 1     199 - +  2006年  [査読有り]

     概要を見る

    The zinc, lead and alumina contents in copper smelting slag are increasing with the increase in waste recycling. The recovery of base metals such as lead and zinc from copper converter slag is important from both an economical and environmental perspective. As a fundamental study of the metal recovery by reduction process, activity coefficients of ZnO and PbO in the CaO-SiO2-FeOx-5mass%AlO1.5 slag under iron saturation at 1573K are derived from the data of slag-metal equilibrium experiments. On the basis of the obtained data, the activity coefficients of ZnO and PbO in the CaO-SiO2-FeOx-5mass%AlO1.5 slag were compared with those of the CaO-SiO2-FeOx ternary system. Addition of alumina increases activities coefficient of ZnO and PbO in SiO2 rich side of the slag, and decreases them in CaO rich side.

  • Distribution of precious metals (Au, Pt, Pd, Rh and Ru) between copper matte and iron-silicate slag at 1573 K

    Hector M. Henao, Katsunori Yamaguchi, Shigeru Ueda

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 1     723 - +  2006年  [査読有り]

     概要を見る

    There is an increasing trend in the copper smelters to recycle electronic materials, which contain relatively high concentration of precious metals. As a consequence, the amount of precious metals lost in the slag phase is increasing. To determine the portion of the precious metals chemically dissolved and that associated with the mechanically trapped matte in the slag will be a key factor to improve the recovery of those metals. Thus, an experimental study was carried out to determine the distribution of precious metals (Xu, Pt, Pd, Rh, Ru) between the equilibrated copper matte and iron-silicate slag phases. The experiments were made in a magnesia crucible at 1573 K and a fixed partial pressure of SO2 of 0.1 atm for the matte grades between 40 and 70 mass% of copper. It was found that the distribution ratios (defined as mass% X in slag/mass% X in matte, where X represents the precious metal) are around 10(-2) for Ru, 10(-3) for An, Pt and Pd and 10(-4) for Rh. The distribution ratios show a tendency to increase when the grade of matte is increased.

  • Elemental sulphur fixation in smelting gas; Is it feasible?

    Takahiko Okura, Shigeru Ueda, Katsunori Yamaguchi

    SOHN INTERNATIONAL SYMPOSIUM ADVANCED PROCESSING OF METALS AND MATERIALS, VOL 8     425 - +  2006年  [査読有り]

     概要を見る

    Sulphur, with its multiple oxidation states, play critical roles in many processes, ranging from regulating enzymes in plants, to acidifying aquatic systems, and to affecting the global climate. Most of non-ferrous smelters have been contributing to reduce atmospheric emissions of sulfur dioxide to acceptable levels, converting it to sulphuric acid and/or gypsum. However, some amount of SO2 gas is still emitted from isolated smelters. Furthermore, sulphuric acid is competing with involuntary elemental sulphur in the market. This situation puts the non-ferrous metallurgical industries to develop a new sulphur fixation process.
    This paper briefly describes the new technologies for fixation, followed by the novel proposal to convert SO2 gas to elemental sulphur using organic materials. Finally, the feasibility will be presented technologically and economically.

  • 微量なNiを含むCo-29Cr-6Mo合金のイオン溶出挙動に及ぼす第5元素添加の影響

    黒須 信吾, 野村 直之, 山口 勉功, 藤沼 重雄, 千葉 晶彦

    日本金属学会誌   69 ( 10 ) 886 - 891  2005年10月

    DOI CiNii

    Scopus

    16
    被引用数
    (Scopus)
  • 微量なNiを含むCo‐29Cr‐6Mo合金のイオン溶出挙動に及ぼす第5元素添加の影響

    黒須 信吾, 野村 直之, 山口 勉功, 藤沼 重雄, 千葉 晶彦

    日本金属学会誌   69 ( 10 ) 886 - 891  2005年10月

     概要を見る

    &amp;nbsp;&amp;nbsp;In order to investigate the effects of 5th element addition to Co-29Cr-6Mo-1Ni alloys on metal ion release, Co-29Cr-6Mo-1Ni-X(X=Ti, Nb, Al, Zr) alloys were immersed in 1 mass% lactic acid solution at 37&amp;deg;C for 7 days and released metal ions were examined by ICP-AES. All of the 5th element added alloys showed less Ni ion quantities released from various alloys than that released from the original Co-29Cr-6Mo-1Ni alloy. This result suggests that Ni ion release could be suppressed by Ni-fixation mechanism due to the formation of Ni-X compounds (X=Ti, Al, Nb, Zr). Furthermore, the quantities of Co ion from Co-29Cr-6Mo-1Ni-X(X=Ti, Zr) alloys were a half less than that from the original. Each metal ion quantity released from Co-Cr-Mo-Ni alloys consisting hcp phase is lower than that from the alloys consisting fcc phase. From the relationship between microstructure and released metal ion quantity, Co-Cr-Mo-Ni alloys consisting hcp phase exhibit low released metal quantities compared to those consisting fcc phase. Therefore, it is likely that metal ion release is suppressed by controlling microstructure through the alloying method.&lt;br&gt;

    CiNii

  • Thermodynamic study on the Ag-Pb-O system at 1273 K

    S Ueda, T Kumagai, K Yamaguchi

    MATERIALS TRANSACTIONS   46 ( 8 ) 1861 - 1864  2005年08月

     概要を見る

    The phase relations for the Ag-Pb-O system saturated with alumina and the activity coefficient of AgO0.5 in the PbO melt were investigated at 1273 K. A chemical equilibrium technique and an EMF method were applied to the measurement. In this system, there is a miscibility gap between a molten Ag-Pb alloy phase and a Pb-Ag-O oxide phase. The solubility of Ag in the oxide phase and that of Ph in the metal phase were studied as a relation of the partial oxygen pressure. These results suggest that component of silver oxide in liquid PbO phase should be represented as AgO0.5. The activity coefficient of AgO0.5 in the PbO based oxide melt at infinite dilution relative to pure solid AgO0.5 is 0.602 at 1273 K.

    DOI CiNii

    Scopus

    8
    被引用数
    (Scopus)
  • Thermodynamic study on the Ag-Pb-O system at 1273 K

    S Ueda, T Kumagai, K Yamaguchi

    MATERIALS TRANSACTIONS   46 ( 8 ) 1861 - 1864  2005年08月  [査読有り]

     概要を見る

    The phase relations for the Ag-Pb-O system saturated with alumina and the activity coefficient of AgO0.5 in the PbO melt were investigated at 1273 K. A chemical equilibrium technique and an EMF method were applied to the measurement. In this system, there is a miscibility gap between a molten Ag-Pb alloy phase and a Pb-Ag-O oxide phase. The solubility of Ag in the oxide phase and that of Ph in the metal phase were studied as a relation of the partial oxygen pressure. These results suggest that component of silver oxide in liquid PbO phase should be represented as AgO0.5. The activity coefficient of AgO0.5 in the PbO based oxide melt at infinite dilution relative to pure solid AgO0.5 is 0.602 at 1273 K.

    DOI CiNii

    Scopus

    8
    被引用数
    (Scopus)
  • プラスチックを用いた亜硫酸ガス還元による元素硫黄生成

    植田 滋, 中里 洋介, 大藏 隆彦, 山口 勉功, 武田 要一

    資源と素材   121 ( 4 ) 5,90-95 - 95  2005年05月

     概要を見る

    To produce non-ferrous metals, the SO&lt;SUB&gt;2&lt;/SUB&gt; gas is also generated from the raw material such as sulfide or sulfate. A process that produces Elemental sulphur from non-ferrous smelter gas and waste plastics was investigated. &lt;BR&gt;Polyethylene was used as a deoxidizer of SO&lt;SUB&gt;2&lt;/SUB&gt; gas in the present study. The conditions for reaction of SO&lt;SUB&gt;2&lt;/SUB&gt; and polyethylene to make gas mixtures of H&lt;SUB&gt;2&lt;/SUB&gt;S and SO&lt;SUB&gt;2&lt;/SUB&gt; were calculated thermodynamically. The Claus reaction was applied to produce elemental sulphur from H&lt;SUB&gt;2&lt;/SUB&gt;S and SO&lt;SUB&gt;2&lt;/SUB&gt; gas mixture. More than 90% sulphur recovered from SO&lt;SUB&gt;2&lt;/SUB&gt; gas in small experimental furnaces used in the present study.

    DOI CiNii

  • プラスチックを用いた亜硫酸ガス還元による元素硫黄生成

    植田 滋, 中里 洋介, 大藏 隆彦, 山口 勉功, 武田 要一

    資源と素材   121 ( 4 ) 90 - 95  2005年05月  [査読有り]

     概要を見る

    To produce non-ferrous metals, the SO2 gas is also generated from the raw material such as sulfide or sulfate. A process that produces Elemental sulphur from non-ferrous smelter gas and waste plastics was investigated. <BR>Polyethylene was used as a deoxidizer of SO2 gas in the present study. The conditions for reaction of SO2 and polyethylene to make gas mixtures of H2S and SO2 were calculated thermodynamically. The Claus reaction was applied to produce elemental sulphur from H2S and SO2 gas mixture. More than 90% sulphur recovered from SO2 gas in small experimental furnaces used in the present study.

    DOI CiNii

  • Phase Equilibrium and Thermodynamics Properties of SiO2-CaO-FeOx Slags for Copper Smelting

    YAMAGUCHI Katsunori, UEDA Shigeru, TAKEDA Yoichi

    Scand. J. Metall.   34 ( 2 ) 164 - 174  2005年

    DOI CiNii

    Scopus

    11
    被引用数
    (Scopus)
  • Phase Equilibrium and Thermodynamics Properties of SiO2-CaO-FeOx Slags for Copper Smelting

    YAMAGUCHI Katsunori, UEDA Shigeru, TAKEDA Yoichi

    Scand. J. Metall.   34 ( 2 ) 164 - 174  2005年  [査読有り]

    DOI CiNii

    Scopus

    11
    被引用数
    (Scopus)
  • 廃プラスチックを用いた石膏の分解

    畠山 祐樹, 植田 滋, 大蔵 隆彦, 中村 公, 山口 勉功

    材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting   17 ( 4 ) 866 - 866  2004年09月

    CiNii

  • 熱量測定によるZn-Te合金の熱力学的研究

    山口 勉功

    熱測定 : netsu = Calorimetry and thermal analysis   31 ( 3 ) 100 - 107  2004年06月

    CiNii

  • 熱量測定によるZn-Te合金の熱力学的研究

    山口 勉功

    熱測定   31 ( 3 ) 100 - 107  2004年

     概要を見る

    ZnTe化合物の熱含量を落下型熱量計を用いて,750~1600Kの温度範囲で測定した。&lt;br&gt;熱含量-温度プロットからZnTe化合物の融点は1573±3K,融解熱は51.1±0.3kJ mol&lt;sup&gt;-1&lt;/sup&gt;と決定された。得られた熱含量値にShomate関数を適用して,固体領域の熱含量ならびに比熱の温度依存性を決定した。ZnTe化合物の生成熱および溶融Zn-Te2元系の混合熱を高温双子型熱量計を用いて測定した。溶融Zn-Te2元系合金の混合エンタルピーは化合物組成付近に近づくにつれ負の大きな値を示し,融体中に化学的な短範囲規則性が存在することが予想される。得られたZn-Te2元系合金の熱力学および従来の状態図データにAssociated Solutionモデルを適応し,モデルのパラメータを導出した。決定されたモデルのパラメータを用いて算出された熱力学諸量および状態図は,実験結果を良く再現できる。

    DOI CiNii

  • 熱量測定によるZn-Te合金の熱力学的研究

    山口 勉功

    熱測定   31 ( 3 ) 100 - 107  2004年  [査読有り]

    DOI CiNii

  • Impurity Removal from Carbon Saturated Liquid Iron Using Lead Solvent

    Mater. Trans. JIM   36 ( 12 ) 432 - 437  2003年

  • Measurement of high temperature heat content of silicon by drop calorimetry

    K Yamaguchi, K Itagaki

    JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY   69 ( 3 ) 1059 - 1066  2002年

     概要を見る

    Heat content of silicon has been measured in a temperature range of 700-1820 K using a drop calorimeter. Boron nitride was used as a sample crucible. The enthalpy of fusion and the melting point of silicon determined from the heat content-temperature plots are 48.31 +/- 0.18 kJ mol(-1) and 1687 +/- 5 K, respectively. The heat content and heat capacity equations were derived using the Shomate function for the solid region and the least square method for the liquid region, respectively, and compared with the literature values.

    DOI CiNii

    Scopus

    60
    被引用数
    (Scopus)
  • Measurement of High Temperature Heat Content of Silicon by Drop Calorimetry

    YAMAGUCHI K, ITAGAKI K

    J. Thermal Analysis and Calorimetry   69 ( 3 ) 1059 - 1066  2002年  [査読有り]

    DOI CiNii

    Scopus

    60
    被引用数
    (Scopus)
  • 落下型熱量計による高温熱含量測定

    山口 勉功, 板垣 乙未生

    熱測定   29 ( 4 ) 173 - 180  2002年  [査読有り]

    DOI CiNii

  • ジルコニア固体電解質電池法による溶融 In-Sb-Ag, In-Sb-Te 3元系合金のインジウムの活量測定

    板橋 賢, 山口 勉功, 亀田 和夫

    日本金屬學會誌   65 ( 9 ) 888 - 892  2001年09月

     概要を見る

    Emf of galvanic cells with zirconia solid electrolyte was measured to determine the activity of indium in the liquid In-Sb-Ag and In-Sb-Te systems in temperature ranges from 970 to 1280 K for the In-Sb-Ag system and for the In-Sb-Te from 870 to 1260 K. The following cells were used: Pt/Ni, NiO|ZrO&lt;SUB&gt;2&lt;/SUB&gt;(+CaO)|In-Sb-Ag, In&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;3&lt;/SUB&gt;/Re/Pt, Pt/Ni, NiO|ZrO&lt;SUB&gt;2&lt;/SUB&gt;(+CaO)|In-Sb-Te, In&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;3&lt;/SUB&gt;/Re/Pt. The isoactivity curves in the liquid In-Sb-Ag and In-Sb-Te systems at 1100 K were derived from combining the activity data of the In-Sb, In-Ag and In-Te binary alloys. The shape of isoactivity curves in the liquid In-Sb-Ag exhibits a slight bend to the Sb-Ag binary side, and those of the liquid In-Sb-Te gather from the whole composition range of the In-Sb binary alloy to the intermediate composition of the In-Te system.

    CiNii

  • ジルコニア固体電解質電池法による溶融 In-Sb-Ag, In-Sb-Te 3元系合金のインジウムの活量測定

    板橋 賢, 山口 勉功, 亀田 和夫

    日本金属学会誌   65 ( 9 ) 888 - 892  2001年09月  [査読有り]

    CiNii

  • ジルコニア固体電解質電池法による溶融 In-Sb-Ag系, In-Sb-Te系合金のインジウムの活量測定

    日本金属学会誌   65 ( 7 ) 888 - 892  2001年

    DOI

    Scopus

    7
    被引用数
    (Scopus)
  • Experimental Determination and Thermodynamic Calculation of the Phase Equilibria in the Cu-In-Sn System

    LIU X J, LIU H S, OHNUMA I, KAINUMA R, ISHIDA K, ITABASHI S, KAMEDA K, YAMAGUCHI K

    J. Electro. Mater.   30 ( 9 ) 1093 - 1103  2001年

    DOI CiNii

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    84
    被引用数
    (Scopus)
  • Experimental Determination and Thermodynamic Calculation of the Phase Equilibria in the Cu-In-Sn System

    LIU X J, LIU H S, OHNUMA I, KAINUMA R, ISHIDA K, ITABASHI S, KAMEDA K, YAMAGUCHI K

    J. Electro. Mater.   30 ( 9 ) 1093 - 1103  2001年  [査読有り]

    DOI CiNii

    Scopus

    84
    被引用数
    (Scopus)
  • Measurement and Assessment of the Thermodynamic Properties and the Phase Diagram of the Cd-Te system

    Mater. Trans. JIM   4 ( 7 ) 790 - 798  2000年

    DOI

    Scopus

    15
    被引用数
    (Scopus)
  • Lead Solubility in FeOx-CaO-SiO2 Slags at Iron Saturation

    KUDO M, JAK E, HAYES P, YAMAGUCHI K, TAKEDA Y

    Metall. Mater. Trans. B   31B ( 1 ) 15 - 24  2000年

    DOI CiNii

    Scopus

    50
    被引用数
    (Scopus)
  • Lead Solubility in FeOx-CaO-SiO2 Slags at Iron Saturation

    KUDO M, JAK E, HAYES P, YAMAGUCHI K, TAKEDA Y

    Metall. Mater. Trans. B   31B ( 1 ) 15 - 24  2000年  [査読有り]

    DOI CiNii

    Scopus

    50
    被引用数
    (Scopus)
  • ジルコニア固体電解質電池法による溶融 In-Bi-Cu 系,In-Sb-Cu 系合金のインジウムの活量測定

    板橋 賢, 亀田 和夫, 山口 勉功, 昆 利子

    日本金屬學會誌   63 ( 7 ) 817 - 821  1999年07月

     概要を見る

    The activities of indium in liquid In-Bi-Cu and In-Sb-Cu alloys have been determined by emf measurement using a zirconia electrolyte at 982&amp;sim;1259 K and 871&amp;sim;1267 K for fifteen and sixteen different compositions of the two alloy systems, respectively. Combining the binary data on In-Bi and In-Cu alloys in the In-Bi-Cu system, and In-Sb and In-Cu alloys in the In-Sb-Cu system, the isoactivity curves at 1050 and 1200 K, 1100 and 1200 K were obtained in the whole composition ranges, respectively. There seem to be no comparable published data.

    DOI CiNii

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    6
    被引用数
    (Scopus)
  • Copper Enrichment of Scrap by Phase Separation in Liquid Fe-Cu-C System

    Metallurgical Review of MMIJ   15 ( 1 ) 26 - 37  1999年

  • 低濃度スクラップからの銅の濃縮

    武田 要一, 山口 勉功

    資源・素材   1998 ( 3 ) 137 - 140  1998年11月

    CiNii

  • Free Energy of Mixing and Vapour Pressure of the Liquid Ga-As, In-As, Ga-P and In-P Alloys

    Z. Metallkde.   82 ( 4 ) 279 - 285  1998年

  • Cu-Fe-C系2液相分離による低品位スクラップからの銅の濃縮

    山口勉功, 武田要一

    資源・素材学会誌   113 ( 12 ) 1110 - 1114  1997年12月

     概要を見る

    A mixture of iron, copper and carbon was melted in a carbon crucible at 1, 453 K. The top layer which was rich in iron and the bottom layer which was rich in copper were clearly separated in the crucible. We could thus make fundamental experiment to carry out a phase separation for copper recovery from iron scrap containing copper. One of the focuses is the effect on the phase separation and the suspension of an extra element to the Fe-Cu-C ternary system. We added Cr, Mn, Al, Si or S to Fe-Cu-C ternary system, and determined the compositions of miscibility gap at 1, 453 K under carbon saturation. In some cases scrap contains precious metal. On this account the recovery distribution ratios of precious metal were also measured.&lt;BR&gt;The alloy compositions on the miscibility gap in the Fe-Cu-C system are 91.1% Fe-4.7% Cu-4.2%C and 96.7%Cu-3.3% Fe. Addition of aluminum, Silicon or sulfur causes the gap to narrow. An increase in carbon solubility in the phase rich in iron reduces copper solubility, which affects recovery of copper from scrap. The relation between copper and carbon solubility in the phase rich in iron is&lt;BR&gt;(% Cu)=0.68 (%C) 2-7.26 (%C) +22.77&lt;BR&gt;Gold, silver and palladium are enriched in the phase rich in copper. Platinum distributes both phases equally. The activity coefficients of Ag, Au, Pd and Pt were estimated from the distribution ratios.

    DOI CiNii

  • Cu-Fe-C系2液相分離による低品位スクラップからの銅の濃縮

    山口勉功, 武田要一

    資源・素材学会誌   113 ( 12 ) 1110 - 1114  1997年12月  [査読有り]

     概要を見る

    A mixture of iron, copper and carbon was melted in a carbon crucible at 1, 453 K. The top layer which was rich in iron and the bottom layer which was rich in copper were clearly separated in the crucible. We could thus make fundamental experiment to carry out a phase separation for copper recovery from iron scrap containing copper. One of the focuses is the effect on the phase separation and the suspension of an extra element to the Fe-Cu-C ternary system. We added Cr, Mn, Al, Si or S to Fe-Cu-C ternary system, and determined the compositions of miscibility gap at 1, 453 K under carbon saturation. In some cases scrap contains precious metal. On this account the recovery distribution ratios of precious metal were also measured.<BR>The alloy compositions on the miscibility gap in the Fe-Cu-C system are 91.1% Fe-4.7% Cu-4.2%C and 96.7%Cu-3.3% Fe. Addition of aluminum, Silicon or sulfur causes the gap to narrow. An increase in carbon solubility in the phase rich in iron reduces copper solubility, which affects recovery of copper from scrap. The relation between copper and carbon solubility in the phase rich in iron is<BR>(% Cu)=0.68 (%C) 2-7.26 (%C) +22.77<BR>Gold, silver and palladium are enriched in the phase rich in copper. Platinum distributes both phases equally. The activity coefficients of Ag, Au, Pd and Pt were estimated from the distribution ratios.

    DOI CiNii

  • ジルコニア固体電解質電池法による溶融In-Pb-Ag系およびIn-Bi-Sb系合金のインジウムの活量測定

    亀田 和夫, 山口 勉功, 昆 利子

    日本金屬學會誌   61 ( 5 ) 444 - 448  1997年05月

     概要を見る

    The activities of indium in liquid In-Pb-Ag and In-Bi-Sb alloys have been determined by the emf measurement using a zirconia electrolyte at 1012&amp;sim;1263 K and 886&amp;sim;1179 K for fifteen different compositions of the two alloy systems, respectively. Combining the binary data on In-Pb and In-Ag alloys in the In-Pb-Ag system, and In-Bi and In-Sb alloys in the In-Bi-Sb system the isoactivity curves at 1100 and 1200 K, 1000 and 1100 K were obtained in the whole composition ranges, respectively. There seem no published data to be compared with.

    DOI CiNii

    Scopus

    3
    被引用数
    (Scopus)
  • GaP, InP, GaAs, InAs化合物の低温比熱

    山口 勉功, 千葉 善幸, 吉澤 正人, 亀田 和夫

    日本金属学会誌   60 ( 12 ) 1182 - 1186  1996年12月

     概要を見る

    Low temperature specific heats of the GaP, InP, GaAs and InAs compounds were measured over the temperature range 4.5 to 298.15 K using an adiabatic calorimeter. The Debye temperatures were derived from the obtained specific heat data. The curves of Debye temperature as a function of temperature for the GaP, InP, GaAs and InAs compounds exhibit a minimum in the temperature range of 15&amp;sim;30 K and a maximum at somewhat higher temparatures (approximately 130&amp;sim;180 K). The standard entropies of the GaP, InP, GaAs and InAs compounds determined from the specific heat data were 50.5, 62.1, 64.1 and 75.5 J/(mol&amp;middot;K), respectively. A relation was found between the standard entropy and the cohesive energy. The standard entropies of the III-V compounds decreased linearly with increasing cohesive energy per bond.

    CiNii

  • GaP, InP, GaAs, InAs化合物の低温比熱

    山口 勉功, 千葉 善幸, 吉澤 正人, 亀田 和夫

    日本金属学会誌   60 ( 12 ) 1182 - 1186  1996年12月  [査読有り]

    CiNii

  • ジルコニア固体電解質電池法による2,3の溶融インジウム系3元合金のインジウムの活量測定

    中内 誠, 亀田 和夫, 山口 勉功, 武田 要一

    資源・素材   1996 ( 1 )  1996年10月

    CiNii

  • ジルコニア固体電解質電池法による溶融In-Bi-Ag系,In-Bi-Te系合金のインジウムの活量測定

    亀田 和夫, 山口 勉功, 五味 敏孝

    日本金屬學會誌   60 ( 5 ) 452 - 456  1996年05月

     概要を見る

    The activities of indium in liquid In-Bi-Ag and In-Bi-Te alloys have been determined by the emf measurement using zirconia electrolyte at 896&amp;sim;1297 K and 816&amp;sim;1111 K for 15 and 18 compositions of the alloys, respectively. Combining the binary data of In-Bi and In-Ag alloys in In-Bi-Ag system, In-Bi and In-Te alloys in In-Bi-Te system for this study, isoactivity curves at 1100 K and 1200 K. 900 K and 1000 K were obtained in the whole composition range, respectively. There seem no published data to be compared with.

    DOI CiNii

    Scopus

    1
    被引用数
    (Scopus)
  • THERMODYNAMIC ANALYSIS OF THE In-P, Ga-As, In-As AND Al-Sb SYSTEMS

    YAMAGUCHI K, ITAGAKI K, CHANG Y A

    Calphad   20 ( 4 ) 439 - 446  1996年

    DOI CiNii

    Scopus

    23
    被引用数
    (Scopus)
  • THERMODYNAMIC ANALYSIS OF THE In-P, Ga-As, In-As AND Al-Sb SYSTEMS

    YAMAGUCHI K, ITAGAKI K, CHANG Y A

    Calphad   20 ( 4 ) 439 - 446  1996年  [査読有り]

    DOI CiNii

    Scopus

    23
    被引用数
    (Scopus)
  • ジルコニア固体電解質電池法による溶融Zn-In系, Cd-In系合金の活量測定

    亀田 和夫, 山口 勉功, 昆 利子

    日本金属学会誌   59 ( 6 ) 634 - 639  1995年06月  [査読有り]

    CiNii

  • Heat Content and Heat of Formation Measurement of R2Ni5 (R : La,Ce,Pr,Nd)Compounds and Heat Balance in a Reduction - Dittusion Process

    YAMAGUCHI K, KIM D‐Y, OHTSUKA M, ITAGAKI K

    J. Alloys and Compounds   221 ( 1/2 ) 161 - 168  1995年

    DOI CiNii

    Scopus

    25
    被引用数
    (Scopus)
  • ジルコニア固体電解質電池法による溶融ZnーIn,Cd-In系合金の活量測定

    日本金属学会誌   59 ( 6 ) 634 - 639  1995年

    DOI

    Scopus

    1
    被引用数
    (Scopus)
  • Enthalpy Measurements and Thermodynamic Evaluation of the Al-Sb System

    Meter. Trans. JIM.   36 ( 3 ) 432 - 437  1995年

    DOI

    Scopus

    30
    被引用数
    (Scopus)
  • Heat Content and Heat of Formation Measurement of R2Ni5 (R : La,Ce,Pr,Nd)Compounds and Heat Balance in a Reduction - Dittusion Process

    YAMAGUCHI K, KIM D‐Y, OHTSUKA M, ITAGAKI K

    J. Alloys and Compounds   221 ( 2 ) 161 - 168  1995年  [査読有り]

    DOI CiNii

    Scopus

    25
    被引用数
    (Scopus)
  • MEASUREMENTS OF HEAT OF FORMATION OF GAP, INP, GAAS, INAAS, GASB AND INSB

    K YAMAGUCHI, Y TAKEDA, K KAMEDA, K ITAGAKI

    MATERIALS TRANSACTIONS JIM   35 ( 9 ) 596 - 602  1994年09月

     概要を見る

    The heats of formation of six III-V compounds of GaP, InP, GaAs, InAs, GaSb and InSb were determined at 773 K from the heats of dissolution of these compounds and the components in a liquid tin solvent, using a Calvet-type twin solution calorimeter. The standard heats of formation at 298.15 K, DELTAH(f,298.15)-degrees, are: GaP (P: red) - 103.2 +/- 7 kJ/mol, InP (P: red) - 70.2+/-4.4 kJ/mol, GaAs - 87.7+/-0.5 kJ/mol, InAs -60.0+/-1.0 kJ/mol, GaSb - 45.9+/-0.3 kJ/mol and InSb - 34.1+/-0.6 kJ/mol. A relation was found between the heats of formation and the bond formation energy, and the overlap interaction in the cohesive energies of these compounds. DELTAH(f,298.15)-degrees decreased linearly with increasing bond formation energy and overlap interaction energy per bond.

    DOI

    Scopus

    41
    被引用数
    (Scopus)
  • Measurements of High Temperature Heat Content of the II-VI and IV-VI Compounds

    Meter. Trans. JIM.   35 ( 2 ) 118 - 124  1994年

    DOI

    Scopus

    33
    被引用数
    (Scopus)
  • 起電力測定法による溶融Te-Pb系合金の熱力学的性質

    亀田 和夫, 山口 勉功, 堀江 皓, 昆 利子

    日本金属学会誌   57 ( 7 ) 774 - 780  1993年07月  [査読有り]

    CiNii

  • ジルコニア固体電解質電池法による溶融Tl-Bi系合金の活量測定

    亀田 和夫, 山口 勉功, 昆 利子

    日本金属学会誌   56 ( 8 ) 900 - 906  1992年08月  [査読有り]

    CiNii

  • ジルコニア固体電解質電池法による溶融Tl-In系合金の活量測定

    亀田 和夫, 山口 勉功

    日本金属学会誌   56 ( 1 ) 69 - 66  1992年01月  [査読有り]

    CiNii

  • ジルコニア固体電解質電池法による溶解Pb-Tl系合金の活量測定

    亀田 和夫, 山口 勉功

    日本金属学会誌   55 ( 9 ) 951 - 956  1991年09月  [査読有り]

    CiNii

  • THERMODYNAMIC INVESTIGATIONS OF THE LIQUID AS-ZN AND AS-CD SYSTEMS BY DROP CALORIMETRY

    K YAMAGUCHI, A MIKULA, KL KOMAREK, K ITAGAKI

    ZEITSCHRIFT FUR METALLKUNDE   82 ( 8 ) 591 - 598  1991年08月  [査読有り]

     概要を見る

    The heat content of the binary As-Zn and As-Cd systems were determined by a drop calorimeter in the concentration range from x(As) = 0.04 to 0.48 in the As-Zn system and in the As-Cd system from x(As) = 0.10 to 0.40. The temperature range for the zinc system was from 800 K to 1450 K and for the cadmium system from 750 K to 1250 K. The method of the thermodynamic analysis was applied to derive the other thermodynamic properties from the heat content measurements of both binary systems. In the As-Zn system the heat of mixing has a peaked minimum at approximately x(As) = 0.43 and the parabolic curve of the entropy of mixing exhibit a depression at the same composition. These strongly temperature dependent anomalies are explained by the existence of some sort of chemical short range order in the liquid. With increasing temperature these associates begin to dissociate.

  • 金属ヒ化物およびアンチモン化物(MxAsy,MxSby(M=Cu,Fe,Co,Ni))の熱測定

    Espeleta Antonio K, 山口 勉功, 板垣 乙未生

    資源と素材   107 ( 9 ) 658 - 663  1991年08月  [査読有り]

    CiNii

  • ジルコニア固体電解質電池法による溶融Ag-Bi系合金の活量測定

    亀田 和夫, 山口 勉功

    日本金属学会誌   55 ( 5 ) 536 - 544  1991年05月  [査読有り]

    CiNii

  • 溶融Te-Tl系合金の熱力学的性質

    亀田 和夫, 山口 勉功

    日本金属学会誌   55 ( 5 ) 529 - 535  1991年05月  [査読有り]

    CiNii

  • THERMOCHEMICAL PROPERTIES OF SOME LIQUID III-V ALLOYS

    K YAMAGUCHI, K ITAGAKI

    THERMOCHIMICA ACTA   163   287 - 294  1990年06月  [査読有り]

    DOI CiNii

    Scopus

    3
    被引用数
    (Scopus)
  • HIGH-TEMPERATURE HEAT CONTENTS OF III-V SEMICONDUCTOR SYSTEMS

    K ITAGAKI, K YAMAGUCHI

    THERMOCHIMICA ACTA   163   1 - 12  1990年06月  [査読有り]

    DOI CiNii

    Scopus

    57
    被引用数
    (Scopus)
  • 熱量測定によるIn-P系,Ga-P系融体の熱力学的研究

    山口 勉功, 板垣 乙未生, 矢澤 彬

    日本金属学会誌   53 ( 11 ) 1140 - 1147  1989年11月  [査読有り]

    CiNii

▼全件表示

書籍等出版物

  • Comprehensive Handbook of Calorimetry and Thermal Analysis

    John Wiley & Sons  2004年

  • Comprehensive Handbook of Calorimetry and Thermal Analysis

    John Wiley & Sons  2004年

  • 熱分析の基礎と応用(第3版)

    リアライズ社  1994年

  • 熱分析の基礎と応用

    リアライズ社  1989年

講演・口頭発表等

▼全件表示

共同研究・競争的資金等の研究課題

  • 非鉄製錬スラグの再資源化技術

    省エネルギー技術研究開発費

    研究期間:

    2003年
    -
     
     

  • Slag Cleaning

    Energy Conservation Technology Research and Development

    研究期間:

    2003年
    -
     
     

Misc

  • 講演 平衡論に基づいたリサイクル原料の銅製錬に及ぼす影響 (第37回 リサイクル製錬原料の高品質化技術の開発)

    山口 勉功

    環境資源工学会シンポジウム「リサイクル設計と分離精製技術」発表資料集   37  2019年02月

    CiNii

  • 貴金属のリサイクル技術 (特集 貴金属・レアメタルのリサイクル技術や環境技術(上))

    山口 勉功

    金属   87 ( 8 ) 676 - 683  2017年08月

    CiNii

  • 連携記事 金属リサイクルにおける乾式非鉄製錬

    山口 勉功

    ふぇらむ = Bulletin of the Iron and Steel Institute of Japan : (一社)日本鉄鋼協会会報   21 ( 4 ) 156 - 161  2016年

    CiNii

  • ネオジム磁石からの希土類回収技術開発研究の近況 (特集 レアメタルリサイクルの意義とリサイクル技術開発の動向について)

    関本 英弘, 山口 勉功

    まぐね   11 ( 1 ) 21 - 26  2016年

    CiNii

  • レアメタルリサイクルの動向と課題 (特集 グリーンイノベーション)

    山口 勉功

    Journal of the Society of Inorganic Materials, Japan : セッコウ・石灰・セメント・地球環境の科学   21 ( 373 ) 441 - 445  2014年11月

    CiNii

  • 手解体等の省力化を目指した使用済みモーターからのレアアースの回収 (特別講演(第133回例会 岩手における廃棄物の処理とリサイクル))

    山口 勉功

    環境資源工学 = Resources processing : 資源処理技術   61 ( 4 ) 218 - 221  2014年

    CiNii

  • 災害廃棄物仮置場における重金属の挙動

    晴山 渉, 岸本 光平, 鳴海 貴之, 山口 勉功, 大河原 正文, 中澤 廣

    廃棄物資源循環学会研究発表会講演集   23 ( 0 ) 161 - 161  2012年

     概要を見る

    東日本大震災により、岩手、宮城、福島の沿岸市町村で推計1879万9千トンの災害廃棄物が発生した。これらの災害廃棄物は、ほぼ全て仮置場に収集されており、順次処理が行われている。災害廃棄物は、様々な物質の混合物であり、有害物質を含有している可能性がある。そこで本研究では、災害廃棄物仮置場直下の土壌および仮置場周辺の水を採取し、重金属濃度を測定するとともに、災害廃棄物中に含まれる重金属量を測定することにより、災害廃棄物仮置場における重金属の挙動を検討した。災害廃棄物仮置場周辺地域の水質のPbとB濃度を測定した結果、比較的水の流れの少なくサンプリング地点において、PbとBが検出された。また、仮置場の直下の土壌には、Pbが、表層10~20 cmよりも、比較的表層5 cm以内に多く含有していることが分かった。災害廃棄物の混合物分別土中のPb含有量を測定した結果、土壌よりも高いPb含有量が検出された。

    DOI CiNii

  • 非鉄製錬スラグ混合による製鋼スラグ中鉛の挙動

    丸岡 伸洋, 北村 信也, 柴田 浩幸, 植田 滋, 山口 勉功

    東北大学多元物質科学研究所素材工学研究彙報   65 ( 1 ) 7 - 12  2009年12月

    CiNii

  • 金属製錬における熱力学の利用

    山口 勉功

    熱測定 : netsu = Calorimetry and thermal analysis   36 ( 5 ) 255 - 262  2009年11月

    CiNii

  • 落下型熱量計によるRu-Sn二元系合金の高温熱含量測定

    田中 卓也, 山口 勉功

    Thermophysical properties   30   214 - 216  2009年10月

    CiNii

  • III-V族混晶半導体の化学熱力学と結晶成長プロセス

    山口 勉功

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan   125 ( 6 ) 375 - 380  2009年07月

     概要を見る

    The group III-V compound semiconductors and their solid solutions are important materials used in high speed electronic and optical electronic devices. Crystal growth of these semiconductor materials involves processes between the solid and liquid phases or solid and gas phase at near equilibrium conditions. Therefore, knowledge of thermodynamic and thermochemical properties for the semiconductor systems is important for providing optimum conditions in the analysis of processes for the crystal growth. In this report, some thermodynamic and thermochemical data such as heat capacity, standard entropy, heat and free energy of formation of compounds and heat of mixing of solid solutions on calorimetry are summarized. Base on these data, the vapor epitaxial growth of the III-V solid solution crystal are analyzed thermodynamically. The calculated compositions of the alloys have been compared with experiment, showing remarkably good agreement.

    CiNii

  • 特別講演 プラスチックを還元材として用いた石膏の再資源化

    山口 勉功, 植田 滋, 大藏 隆彦

    環境資源工学   53 ( 4 ) 228 - 233  2006年

    CiNii

  • Behavior of Minor Species during Oxidation Smelting of Lead Concentrate

    Lead and Zinc 2005   2   1231 - 1245  2005年

  • 第5版 実験化学講座 温度・熱,圧力

    丸善    2005年

  • Behavior of Minor Species during Oxidation Smelting of Lead Concentrate

    Lead and Zinc 2005   2   1231 - 1245  2005年

  • Extraction of Valuable Metals from Incineration Metal Residue in Molten State

    Global Symposium on Rcycling, Waste Treatment and Tchnology   2   1629 - 1636  2004年

  • Thermodynamic Evaluation of the Cu-Zr System and Treatment of Zirconium Base Alloy Wastes by Using Molten Copper

    Global Symposium on Rcycling, Waste Treatment and Tchnology   3   2579 - 2588  2004年

  • Extraction of Valuable Metals from Incineration Metal Residue in Molten State

    Global Symposium on Rcycling, Waste Treatment and Tchnology   2   1629 - 1636  2004年

  • Thermodynamic Evaluation of the Cu-Zr System and Treatment of Zirconium Base Alloy Wastes by Using Molten Copper

    Global Symposium on Rcycling, Waste Treatment and Tchnology   3   2579 - 2588  2004年

  • 銅製錬における不純物除去技術

    山口 勉功, 棚橋 満, 月橋 文孝, 長崎 英範, 服部 靖匡, 大石 敏雄

    資源と素材   119 ( 10/11 ) 683 - 686  2003年11月

     概要を見る

    Recently, several removal technologies of minor elements in copper smelting have been developed along with the degradation and the diversification of copper concentrates and also for assuring the quality of cathode. This article reviews the current and new elimination technologies of minor elements for copper smelting based on the recently published papers focusing specifically on arsenic, antimony, bismuth, lead and nickel among various impurities. In this article, the removal technologies in copper smelting are classified into five categories; (1) pre-treatment, (2) extraction from matte or copper, (3) dust treatment, (4) anode doping and (5) purification of electrolyte. Vacuum refining which is not established as a current industrial process is also described in this article.

    DOI CiNii

  • 非鉄製錬スラグの現状と課題

    棚橋 満, 月橋 文孝, 山下 智司, 山口 勉功, 御手洗 毅, 酒井 哲郎, 岡部 進

    資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan   119 ( 10 ) 687 - 692  2003年11月

     概要を見る

    A large quantity of slag containing various harmful and heavy metal impurities is generated in non-ferrous metal production industry every year. In order to achieve sustainable development of the industry in Japan during the 21st century, prompt measures should be taken to deal with the ever-increasing quantities of slags. To resolve the slag issues, great efforts have been made to develop their new applications and usage. As a part of the activity of the &quot;Committee for the Investigation Research on Development of Innovative Non-Ferrous Metals Smelting Technologies in the 21st Century&quot;, the current situation and problems on this matter are reviewed focusing on slags generated in copper, lead, zinc, and ferronickel production.

    DOI CiNii

  • 非鉄スラグの現状と課題

    棚橋 満, 月橋 文孝, 山下 智司, 山口 勉功, 御手洗 毅, 酒井 哲郎, 岡部 進

    資源と素材   119 ( 10・11 ) 687 - 692  2003年

     概要を見る

    A large quantity of slag containing various harmful and heavy metal impurities is generated in non-ferrous metal production industry every year. In order to achieve sustainable development of the industry in Japan during the 21st century, prompt measures should be taken to deal with the ever-increasing quantities of slags. To resolve the slag issues, great efforts have been made to develop their new applications and usage. As a part of the activity of the "Committee for the Investigation Research on Development of Innovative Non-Ferrous Metals Smelting Technologies in the 21st Century", the current situation and problems on this matter are reviewed focusing on slags generated in copper, lead, zinc, and ferronickel production.

    DOI CiNii

  • 落下型熱量計による高温熱含量測定

    山口 勉功, 板垣 乙未生

    熱測定 : netsu = Calorimetry and thermal analysis   29 ( 4 ) 173 - 180  2002年09月

    CiNii

  • 浮揚溶解法

    山口 勉功

    熱測定 : netsu = Calorimetry and thermal analysis   29 ( 4 ) 180 - 180  2002年09月

    CiNii

  • 双子示差型熱量計

    山口 勉功

    熱測定 : netsu = Calorimetry and thermal analysis   29 ( 4 ) 180 - 180  2002年09月

    CiNii

  • 落下型熱量計による高温熱含量測定

    山口 勉功, 板垣 乙未生

    熱測定   29 ( 4 ) 173 - 180  2002年

     概要を見る

    落下型熱量計を用いた熱量測定は,1000Kを越えるような高温度域での熱容量,熱含量,相変化熱などの決定法として有効であるが,高温ゆえに実験技術上の問題点も多い。精度よく高温熱含量を測定するために落下型熱量計の加熱炉,温度測定,熱量計,試料系に対しては,様々な工夫や注意を払った設計が試みられており,それらを紹介した。次いで,Shomate関数やQLLR法などの熱含量からの熱容量の導出方法について述べた。また,熱含量測定の応用例として熱力学解析法による合金の熱力学量の導出方法などについて記述した。

    DOI CiNii

  • 冶金熱力学の現状と将来--新しい利用を求めて (特集 世紀をつなぐ--金属の今とこれから) -- (金属を知る科学の今とこれから)

    山口 勉功

    金属   71 ( 9 ) 885 - 888  2001年09月

    CiNii

  • Cd-Te 2 元系合金の熱力学的解析(主題 : メタロイド(半金属)のプロセッシング)(特定テーマシンポジウム)(素材工学研究会記事)

    山口 勉功

    東北大学素材工学研究所彙報 = Bulletin of the Institute for Advanced Materials Processing, Tohoku University   56 ( 1 ) 149 - 149  2001年03月

    CiNii

  • 冶金熱力学の現状と将来

    金属   71 ( 9 ) 885 - 888  2001年

  • Activity of Indium in Molten In-Sb-Ag and In-Sb-Te Alloys Measured by EMF Method Using Zirconia Electrolyte

    Activity of Indium in Molten In-Sb-Ag and In-Sb-Te Alloys Measured by EMF Method Using Zirconia Electrolyte   65 ( 7 ) 888 - 892  2001年

  • 熱量測定・熱分析ハンドブック

    丸善    1998年

  • 熱量測定によるIII-V族合金の熱力学的研究

    山口 勉功, 亀田 和夫

    まてりあ : 日本金属学会会報   35 ( 12 ) 1317 - 1324  1996年12月

    DOI CiNii

  • Ⅲ-Ⅴ族化合物半導体のリサイクリングに関する熱力学的検討 (素材プロセス研究 希少金属素材の再資源化) -- (レアメタル)

    日野 光久, 山口 勉功, 板垣 乙未生

    金属   1996 ( 0 ) 93 - 104  1996年08月

    CiNii

  • Low Temperature Specitic Heat of GaP, InP, GaAs, InAs Compounds

    J. Japan Inst. Metals   60 ( 12 ) 1182 - 1186  1996年

    DOI

  • 熱量測定によるIII‐V族合金の熱力学的研究

    山口 勉功, 亀田 和夫

    まてりあ   35 ( 12 ) 1317 - 1324  1996年

    DOI CiNii

  • 熱量測定による溶融III-V族合金の熱力学諸量の導出

    板垣 乙未生, 山口 勉功

    熱測定 : netsu = Calorimetry and thermal analysis   22 ( 3 ) 178 - 179  1995年07月

    DOI CiNii

  • <記事>気相制御研究分野 (1993.1-1993.12) (研究活動報告)

    板垣 乙未生, 日野 光久, 大塚 誠, 山口 勉功, 周 玉林, 遠藤 城幸, 小林 宙, 佐武 秀機, D. Y. Kim, S. Surapunt, R. R. Vazquez, C. M. Nyamai

    東北大学素材工学研究所彙報 = Bulletin of the Institute for Advanced Materials Processing, Tohoku University   49 ( 1 ) 148 - 149  1994年03月

    CiNii

  • III-V族合金の平衡蒸気圧と化合物半導体の気相制御

    山口 勉功, 板垣 乙未生, Katsunori YAMAGUCHI, Kimio ITAGAKI

    東北大学素材工学研究所彙報   49 ( 1 ) p89 - 100  1993年12月

    CiNii

  • Vapour Pressure of III-V Alloys and Gas Processing for Crystal Growth of III-V Compound Semiconductors

    Bulletin of Institute Advanced Materials Processing Tohoku Univ.   49 ( 1 ) 89 - 100  1993年

  • Activity Measurements of Liquid Te-Pb Alloys by an EMF Method

    J. Japan Inst. Metals   57 ( 7 ) 774 - 780  1993年

    DOI

  • Activity Measurements of Liquid Te-Bi Alloys by an EMF Method Using Zirconia Electrlytes

    J. Japan Inst. Metals   57 ( 2 ) 158 - 163  1993年

    DOI

  • Activity Measurements of Liquid Tl-Bi Alloys by an EMF Method Using Zirconia Electrolyters

    J. Japan Inst. Metals   56 ( 8 ) 900 - 906  1992年

    DOI

  • ACTIVITY MEASUREMENTS OF LIQUID TL-IN ALLOYS BY AN EMF METHOD USING ZIRCONIA ELECTROLYTES

    K KAMEDA, K YAMAGUCHI

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   56 ( 1 ) 60 - 66  1992年01月

     概要を見る

    The activity of the liquid Tl-In alloys has been determined by the emf measurements of the following galvanic cells: + Pt/Ni(s), NiO(s)\ZrO2(+ CaO)\Tl-In(1), In2O3(s)/Ir/Pt - (for N(In) = 0.60 approximately 0.90 at 878 to 1273 K), + Pt/Ni(s), NiO(s)\ZrO2(+ Y2O3)\Tl-In(1), In2O3(s)/Ir/Pt - (for N(In) = 0.20 approximately 0.50 at 830 to 1081 K).
    The activities of indium and thallium in the liquid Tl-In alloys show very slight positive deviations from Raoult's law and do not agree with the result by Kundys and Terpilowski but agree well with the result by Zheng and Kozuka. The gamma-degrees(In) and gamma-degrees(Tl) values are estimated to be 1.28 and 1.21 at 900 K and 1.25 and 1.16 at 1050 K, respectively. The alpha-function of indium against N(In) does not show a constant value, suggesting no regular solution behavior.
    The free energy of mixing at 900 K shows slightly smaller positive values than DELTA-G(id), and the peak value of DELTA-G is -4.69 kJ/mol at about N(In) = 0.49. The heat of mixing shows very small positive values, in close agreement with the result by Wittig and Muller. The peak value of DELTA-H is 0.55 kJ/mol at about N(In) = 0.58. It is shown that the zeta-function in liquid Tl-In alloys is a linear equation with composition and the entropy is closer to that of an ideal solution. Hence the properties of this system appear to be similar to those of a subregular solution.

    DOI

  • ACTIVITY MEASUREMENTS OF LIQUID PB-TL ALLOYS BY AN EMF METHOD USING A ZIRCONIA ELECTROLYTE

    K KAMEDA, K YAMAGUCHI

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   55 ( 9 ) 951 - 956  1991年09月

     概要を見る

    The emf measurements of the following galvanic cells have been carried out to determine the standard free energy of formation of PbO(s) and the thermodynamic quantities of liquid Pb-Tl alloys: -Pt/Ni(s), NiO(s) \ZrO2 (+ Y2O3) \Pb-Tl (l), PbO(s)/Ir/Pt+ (for N(Pb) = 0.10 approximately 0.90 at 805 to 1130 K), -Pt/Ni(s), NiO(s) \ZrO2 (+ Y2O3) \Pb(l), PbO(s)/Ir/Pt+ (at 810 to 1104 K).
    The standard free energy of formation of PbO(s) was determined as follows: DELTA-G-(PbO(s))-Degrees /J.mol-1 = -217580 + 98.7 T +/- 200 in the temperature range 810-1104 K.
    Activity of lead in liquid Pb-Tl alloys at 850 and 950 K show slightly smaller positive and negative deviations from the Raoult's law. The activity of thallium at the same temperature exhibits a smaller negative deviation from the Raoult's law over almost all the concentration range except for the thallium rich region. It is nearly in agreement with the ideality in the thallium rich side of the system. The gamma-Pb-degrees and gamma-Tl-degrees values are estimated to be 0.62 and 0.69 at 850 K and 0.65 and 0.74 at 950 K, respectively. The alpha functions of lead against N(Pb) never show a constant value, suggesting no regular solution behavior.
    The free energy of mixing at 950 K shows slightly smaller negative values than DELTA-G(id), and the peak value of DELTA-G is -6.3 kJ/mol at about N(Pb) = 0.49. The heat of mixing shows very small negative values. The peak value of DELTA-H is -1.3 kJ/mol at about N(Pb) = 0.50.

    DOI

  • ACTIVITY MEASUREMENTS OF LIQUID AG-BI ALLOYS BY AN EMF METHOD USING A ZIRCONIA ELECTROLYTE

    K KAMEDA, K YAMAGUCHI

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   55 ( 5 ) 536 - 544  1991年05月

     概要を見る

    The emf measurements of the following galvanic cells have been carried out to determine the standard free energy of formation of Bi2O3(s) and the thermodynamic quantities of liquid Ag-Bi alloys: (-)Pt/Ni(s), NiO(s) \ZrO2(+ CaO)\Ag-Bi(1), Bi2O3(s)/Ir/Pt(+) (for N(Bi) = 0.20 approximately 0.90 at 886 to 1068 K), (-)Pt/Ni(s), NiO(s) \ZrO2(+ CaO)\Bi(1), Bi2O3(s)/Ir/Pt(+) (at 888 to 1065 K). The standard free energy of formation of Bi2O3(s) are determined as follows; DELTA-G(Bi2O3(s)-degrees/J.mol-1 = -582520 + 293.94T +/- 530 between 888 and 997 K DELTA-G(Bi2O3(s)-degrees/J.mol-1 = -549700 + 261.06T +/- 460 between 997 and 1065 K.
    The concentration dependence of activities of bismuth shows a positive moderate deviation from the Raoult's law. Activities of silver show both positive and negative deviations from Raoult's law. Our data for bismuth do not agree with the result by Gregorczyk but roughly do well with that by Aldred et al. and Predel et al.
    The order of magnitude of both activities and heats of mixing IB metals (Cu, Ag and Au)-bismuth binary alloys in the intermediate composition range is approximately the same as that in the Periodic Table (i.e., Cu, Ag and Au). The activities and the heats of mixing of the Au-Bi alloys show small negative deviations and smaller exothermic values, respectively, over the whole concentration range. Such a affinity of Au-Bi alloys may be ascribed to the larger differences in the electronegativities in the gold alloys.
    In addition, the results of both activities and heats of mixing measurements in the liquid binary alloys composed of IB metals and bismuth and those composed of IB metals and other typical normal metals (i.e., Zn, Cd, Al, Ga, In, Sn and Sb etc.,) have been compared and discussed in connection with the electronic structure of the elements and with the alloy theory by Engel concerning the phase stability of solid solution between IB metals and typical normal metals.

    DOI

  • Thermodynamic Investigation of Liquid Te-Tl Alloys

    J.Japan Inst.Metals   55 ( 5 ) 529 - 535  1991年

    DOI

  • HIGH-TEMPERATURE HEAT CONTENTS OF III-V SEMICONDUCTOR SYSTEMS

    K ITAGAKI, K YAMAGUCHI

    THERMOCHIMICA ACTA   163   1 - 12  1990年06月

    DOI CiNii

  • Activity Measurements of Liquid Zn-In and Te-In Alloys by an EMF Method Using Zirconia Electrolytes

    J.Japan Inst.Metals   54 ( 11 ) 1222 - 1227  1990年

    DOI

  • Thermochemical Properties of Some liquid III-V Alloys

    Thermochimica Acta   163   287 - 294  1990年

    DOI CiNii

  • Termodynamic Investigation of the Liquid Ga-P and In-P Systems by the Use of a Drop-Calorimeter

    Journal of the Japan Institute of Metals   53 ( 11 ) 1140 - 1147  1989年

    DOI

  • High Temperature Heat Content Measurements of the III-V Compounds

    Journal of the Japan Institute of Metals   53 ( 8 ) 764 - 770  1989年

    DOI

  • Ⅲ-Ⅴ化合物半導体の熱力学的研究

    資源・素材関係合同秋季大会分科研究会資料   S-2   9 - 12  1988年

  • THERMODYNAMIC INVESTIGATION OF LIQUID GA-AS AND IN-AS SYSTEMS BY THE USE OF A DROP-CALORIMETER

    K YAMAGUCHI, K ITAGAKI, A YAZAWA

    JOURNAL OF THE JAPAN INSTITUTE OF METALS   52 ( 10 ) 966 - 972  1988年

    DOI

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