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A New Production Process of Functional Cerium Sulfide by Sulfurization of Cerium Oxide

Research Project

Project/Area Number 07650863
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionMuroran Institute of Technology

Principal Investigator

SHIMAKAGE Kazuyoshi  Muroran Institute of Technology Faculty of Eng Professor, 工学部, 教授 (70005346)

Co-Investigator(Kenkyū-buntansha) HIRAI Shinji  Muroran Institute of Technology Faculty of Eng Associate Professor, 工学部, 助教授 (10208796)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1996: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1995: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsCerium Sulfide / Cerium Oxide / CS_2 Gas / Sulfurization / Synthesis / Sintering / Functional Materials / Activation Energy / 合成 / 焼結
Research Abstract

In the present study, an attempt has made to synthesized Ce_2S_3 powder at a lower temperature and to elucidate the densification behavior for the sintering of synthetic powders. At first, sulfurization reaction of CeO_2 powder using CS_2 gas instead of H_2S gas was examined for preparing Ce_2S_3 powder. CS_2 gas can be handled easily than H_2S gas since it is a volatile liquid and less virulent. Moreover, it is expected to lower the reaction temperature of the sulfurization. Appropriate conditions for preparing a single phase of each polymorphic forms of Ce_2S_3 were established by sulfurization reaction of CeO_2 powder using CS_2 gas. Second, hot-pressing was also attemped by using synthetic Ce_2S_3 powder to fabricate the sintered compact, and the densification behavior was discussed.
CeS_2 was formed in the initial stage of reaction at temperature of 923K and above, and alphaalpha-Ce_2S_3 was finally formed for a shorter period of time at higher temperatures instead of CeS_2. The single phase of alpha-Ce_2S_3 could be synthesized by sulfurization reaction at 973K for 28.8ks. Since the formation of alpha-Ce_2S_3 was accelerated by the addition of carbon black to the CeO_2 powder, the carbothermic reduction was considered to become a dominant reaction with an increase in temperature. The densification behavior of beta-Ce_2S_3 powder prepared by vacuum heating of alpha-Ce_2S_3 was also examined under hot-pressing. Since grain growth was suppressed at a relative density range from rho=0.77 to rho=0.88, kinetic analysis of sintering was made by using the data in this region.
As a results, it was found that sintering kinetics were best explained by a grain-boundary diffusion mechanism with an apparent activation energy of 382kJ/mol.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 嶋影和宜: "CeO_2のCS_2ガス硫化によるCe_2S_3の生成" 日本金属学会第116回大会講演概要集. p54 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 平井伸治: "Ce_2S_3粉末の生成と焼結性" 日本セラミックス協会第8回シンポジウム講演予稿集. p329 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 嶋影和宜: "Ce_2S_3化合物の合成と焼結挙動" 資源・素材学会秋季大会講演集(素材プロセシング資料). p88-91 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kazuyoshi Shimakage: "Synthesis and Sintering of Ce_2S_3 Powder" Journal of the American Ceramic Society. (in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kazuyoshi Shimakage: "Synthesis of Ce_2S_3 Compound by Sulfurizatio of CeO_2S_3 with CS_2 Gas" Proceedings of 116th Spring Meeting of Japan Institute of Metals. 54 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Shinj Hirai: "Preparation and Sintering of Ce_2S_3 powder" Proceedings of 8th Symposium of Japan Ceramic Society. 329 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kazuyoshi Shimakage: "Synthesis of Ce_2S_3 Compound and lts Sintering Behavior" Proceedings of Autumn Meeting of Japan Institute of Metals. 88-91 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kazuyushi Shimakage: "Synthesis and Sintering of Ce_2S_3 Powder" Journal of the American Ceramic Society. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 嶋影和宜: "CeO_2のCS_2ガス硫化によるCe_2S_3の生成" 日本金属学会第116回大会講演概要集. 54 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 平井伸治: "Ce_2S_3粉末の生成と焼結性" 日本セラミックス協会第8回シンポジウム講演予稿集. 329 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 嶋影和宜: "Ce_2CS_3化合物の合成と焼結挙動" 資源・素材学会秋季大会講演集(素材プロセシング資料). 88-91 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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