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Development of SO_x gas sensor utilizing the improved beta-alumina solid electrolyte

Research Project

Project/Area Number 02505005
Research Category

Grant-in-Aid for Developmental Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field 金属精錬・金属化学
Research InstitutionOsaka University

Principal Investigator

KOZUKA Zensaku  0saka Univ. Fac of Eng Professor, 工学部, 教授 (80028935)

Co-Investigator(Kenkyū-buntansha) KIMURA Hideo  Yanari Sangyou, Research Group Chief Engineer, 研究開発グループ, 主務
IIJIMA Shigeru  Nihon Tokusyu Togyou Chief Engineer, 研究部, 主査補
KANEMATSU Hideyuki  Osaka, Univ.Fac. of Eng Assistant Research Group., 工学部, 助手 (10185952)
YAO Shynya  Osaka, Univ.Fac. of Eng Associate Professor, 工学部, 助教授 (90029299)
Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥41,000,000 (Direct Cost: ¥41,000,000)
Fiscal Year 1992: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1991: ¥11,600,000 (Direct Cost: ¥11,600,000)
Fiscal Year 1990: ¥28,200,000 (Direct Cost: ¥28,200,000)
Keywordsbeta-alumina / SO_x gas sensor / surface improvement / sputtering / ベ-タアルミナ / 希土類酸化物 / 硫黄酸化物ガスセンサ-
Research Abstract

The reaction between beta-alumina and rare-earth oxides (Nd_2O_3,CeO_2,Pr_6O_<11>) have been investigated. By using the thin film of rare-earth oxide and Na^+- beta-alumina pellet as samples, the following experimental results could be found. At 1073゚K,Pr_6O_<11> reacted with beta-alumina and the existence of some new compounds were confirmed. In the case of CeO_2 the extra pattern except the characteristic ones of CeO_2 and beta-alumina were not found and it was concluded that CeO_2 was not reacted with beta-alumina Nd_2O_3 reacted with beta-alumina and C-type compound was found and follows transformed to A-type one.
The reaction between beta-alumina pellet and air-SO_x gas mixture have been investigated based on the variation of electritic conductivity of cell with time at 1023 K. The electritic conductivity changed suddenly with the gas flowing into the cell and follows kept nearly constant value it was confirmed that the surface of Na^+-beta-alumina pellet was covered by stable Na_2SO_4 phase within one hour.
From above experimental results, it could be concluded that the best solid electrolyte is the Na^+-beta-alumina covered with CeO_2. The SO_x gas sensor employing Na^+-beta-alumina covered with CeO_2 solid electrolyte was constructed and the responsivility of this sensor at 873 and 1023゚K have been investigated. The equilibrium e.m.f. wasfound to change reliably with the change in P_<so2>. In particularly. the characterization of response to a change in P_<so2> at lower temperature was promoted by means of utilizing the Na^+-bate-alumina diskcovered by CeO_2. Many useful experimental results have been obtainedfor development the practical SO_x sensor.

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 八尾伸也,宮川賢二,飯島繁,幸塚善作: "プラセオジム酸化物をスパッタしたベータアルミナを用いたSO_Xガスセンサに関する基礎的研究" 資源と素材.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Shinya Yao, H.Tanaka, Y.Watanabe, Zensaku Kozuka: "The Effect of Substances Related to H_2O Present in Praseodymium Oxides on The Phase Transition: δ-PrO_X or C-Pr_2O_3→A-Pr_2O_O" Materials Transactions, JIM.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 八尾伸也,渡邊靖之,幸塚善作: "プラセオジム酸化物の相変化に伴うガス放出" 電気化学および工業物理化学.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Shinya Yao,Y.Tamaki,Shigeru Iijima,Zensaku Kozuka: "Reactions of Pr_nO_<2n-2>,Nd_2O_3 and CeO_2 Thin Films with Na^+-β"-alumina plate" Metallurgical Transactions, B.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 八尾伸也,玉置雄一,木村秀雄,幸塚善作: "セリウム酸化物をスパッタしたベータアルミナを用いたSO_Xガスセンサ" 日本金属学会誌.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S.Yao,K.Miyagawa,S.Iijima.Z.Kozuka: "Fundamental Study on the SO_x Gas Sensor Utilizing Beta-Alumina With Sputtered" Shigen-To-Sozai.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S.Yao,H.Tanaka,Y.Watanabe,Z.Kozuka: "The Effect of the Substances Related to H_2O Present in Praseodymium Oxides on the Phase Transition : sigma-PrO_x or C-Pr_2O_3*A-Pr_2O_3" Materials Trans.JIM.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S.Yao,Watanabe,Z.Kozuka: "Evolution Gases Accompaning The Phase Transitions of Praseodymium Oxide Powders" Denki Kagaku.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S.Yao,Y.Tamaki,S.Iijima,Z.Kozuka: "Reactions of Pr_nO_<2n-2>,Nd_2O_3 and CeO_2 Thin Films with Na^+-beta"-alumina plate" Metal.Trans.B.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S.Yao,Y.Tamaki,H.Kimra,Z.Kozuka: "SO_x Gas Sensor Utilizing Beta-Alumina With Spputered Cerium Oxide" J.Japan Inst. of Metals.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 幸塚 善作,八尾 伸也: "プラセオジム酸化物をスパッタしたベ-タアルミナを用いたSO_2センサの製作と性能評価" “化学センサおよびセンサ材料の最近の進歩"研究会試料.

    • Related Report
      1991 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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