Construction of Chemical Potential Diagrams for Metal‐Metal‐Nonmetal Systems: Applications to the Decomposition of Double Oxides

Harumi Yokokawa, Tatsuya Kawada, Masayuki Dokiya

研究成果: Article査読

67 被引用数 (Scopus)

抄録

A chemical potential diagram for A‐B‐O (A, B = metallic elements) systems has been constructed to make visually clear the thermodynamic stability of double oxides; the stability area of metallic elements, their binary oxides, and double oxides can be presented as convex polygons in a log (aA/aB) vs log P(O2) plot, a and P(O2) being the activity of metallic elements and the oxygen partial pressure, respectively; the axis variable, log (aA/aB), is used to treat two metallic elements equivalently. The Co‐Ti‐O and La‐Co‐O systems have been chosen as examples to demonstrate how the present diagram can provide complicated phase relations in a compact and visualized manner. An attempt has also been made to utilize this diagram to present graphically products of kinetic decomposition of double oxides placed in an oxygen potential gradient.

本文言語English
ページ(範囲)2104-2110
ページ数7
ジャーナルJournal of the American Ceramic Society
72
11
DOI
出版ステータスPublished - 1989 11
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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