Thermodynamic Regularities in Perovskite and K2NiF4 Compounds

Harumi Yokokawa, Tatsuya Kawada, Masayuki Dokiya

研究成果: Article査読

84 被引用数 (Scopus)

抄録

It has been found that the enthalpy of formation of perovskite compounds, ΔfH° (ABO3, B = transition metais), from binary oxides can be well characterized in terms the tolerance factor, t≡(rA+ ro)√2 (rB+ ro), where rA and rB are the radii of A‐site ions with 12‐coordination and B‐site ions with 6‐coordination, respectively, and ΔfH°=−168 + 270(1 − t) kJ·mol−1 for AIBVO3, ΔfH°=−125 + 1000(1 − t) kJ·mol−1 for AIIBIVO3, and ΔfH°=− 90 + 720(1 − t) kJ·mol−1 for AIIIBIIIO3. Although the thermodynamic data of K2NiF4 compounds are not extensive, a similar regularity can be found when use is made of the radii of A‐site ions with 9‐coordination for the K2NiF4 compounds. These correlations will be quite useful in predicting.

本文言語English
ページ(範囲)152-153
ページ数2
ジャーナルJournal of the American Ceramic Society
72
1
DOI
出版ステータスPublished - 1989 1月 1
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 材料化学

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