Ordering of Oxygen Vacancies in Ceria-Zirconia Solid Solution

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

doi:10.14853/pcersj.2003S.0.503.0

Preprints of Annual Meeting of The Ceramic Society of Japan, 2003

Session ID : 2I33

DOI https://doi.org/10.14853/pcersj.2003S.0.503.0

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Host: The Ceramic Society of Japan

Ordering of Oxygen Vacancies in Ceria-Zirconia Solid Solution

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

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Abstract

Ceria-zirconia solid solution play an important role as an oxygen supplier as well as absorber in automotive exhaust emission control systems. Structures of Ce₂Zr₂O_7+x with an ordered oxygen vacancies were studied using a HRTEM. On the basis of direct observation with HRTEM and with the aid of computer simulation, the ordered oxygen vacancies in Ce₂Zr₂O₇ and Ce₂Zr₂O_7.5was found to be identified as bright-spot in HRTEM image in the [001] orientation.

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