ＩＴＧの応用　　ランタンクロマイト系酸化物における欠陥化学平衡と物質輸送特性

DOI

書誌事項

タイトル別名
  • Application of Isothermal Thermogravimetry: Effect of Defect Chemistry on Transport Properties in Lanthanum Chromites.
  • Effect of Defect Chemistry on Transport Properties in Lanthanum Chromites
  • ランタンクロマイト系酸化物における欠陥化学平衡と物質輸送特性

抄録

The application of isothermal thermogravimetry (ITG) was introduced as a powerful technique for the case of the determination of oxide ion vacancy concentration in perovskite-type lanthanum chormites, La1-xCaxCrO3-δ. The defect equilibrium was discussed by using both ideal and regular solution models, and it was rather well explained by using regular solution model. The obtained data of defect concentration were very useful to investigate the diffusion mechanism of oxide ion and vacancies in La1-xCaxCrO3-δ. The oxygen vacancy diffusion coefficient (Dv) of La1-xCaxCrO3-δ is constant at T=1273K and it does not depend on the oxygen vacancy concentration (δ). This fact makes it possible to explain the electrochemical oxygen permeation mechanism through a La1-xCaxCrO3-δ dense plate in which the surface reaction of oxygen is considered to be the rate determining step.

収録刊行物

  • 熱測定

    熱測定 26 (3), 76-81, 1999

    日本熱測定学会

詳細情報 詳細情報について

  • CRID
    1390282680063652992
  • NII論文ID
    130003658660
  • DOI
    10.11311/jscta1974.26.76
  • ISSN
    18841899
    03862615
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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