Oxygen absorption behavior of Ce2Zr2O7+x and formation of Ce2Zr2O7.5

Tsuyoshi Sasaki; Yoshio Ukyo; Akihiro Suda; Masahiro Sugiura; Kotaro Kuroda; Shigeo Arai; Hiroyasu Saka

doi:10.14853/pcersj.2002F.0.39.0

15th Fall Meeting of The Ceramic Society of Japan

DOI https://doi.org/10.14853/pcersj.2002F.0.39.0

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Host: The Ceramic Society of Japan

Oxygen absorption behavior of Ce₂Zr₂O_7+x and formation of Ce₂Zr₂O_7.5

Tsuyoshi Sasaki, Yoshio Ukyo, Akihiro Suda, Masahiro Sugiura, Kotaro Kuroda, Shigeo Arai, Hiroyasu Saka

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Keywords: ceria, zirconia, solid solution, structural analysis, oxygen storage capacity, thermogravimetric analysis

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Pages 39

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Abstract

The oxygen absorption behavior of Ce₂Zr₂O_7+x (0≤x≤1) with an ordered arrangement of Ce and Zr ions was studied by thermogravimetric analysis. The results suggest the presence of intermediate phase with Ce₂Zr₂O_7.5 composition. From the X-ray powder diffraction and electron diffraction analysis, the intermediate phase was found to belong to the space group F43m and to be formed by occupying the half of ordered oxygen vacancies with oxygen ions alternately.

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