Phase Transformation Behavior of a Pyrochlore‐Type CeO 2 –ZrO 2 Binary Compound

The phase transformation behavior of the superlattice structure of a CeO 2 – ZrO 2 pyrochlore‐type binary compound ( CP ) was investigated so as to better understand how to improve the thermal stability of such a system. CP was synthesized through high‐temperature reduction of a conventional CeO 2 –...

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Published in:Journal of the American Ceramic Society 2015-02, Vol.98 (2), p.659-662
Main Authors: Morikawa, Akira, Yamamura, Kae, Suda, Akihiko, Tanabe, Toshitaka, Nobukawa, Takeshi, Chiba, Akiya, Takahashi, Naoki
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Language:English
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container_title Journal of the American Ceramic Society
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creator Morikawa, Akira
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description The phase transformation behavior of the superlattice structure of a CeO 2 – ZrO 2 pyrochlore‐type binary compound ( CP ) was investigated so as to better understand how to improve the thermal stability of such a system. CP was synthesized through high‐temperature reduction of a conventional CeO 2 – ZrO 2 solid solution with a 1:1 molar ratio of Ce and Zr . High‐resolution transmission electron microscopy and selected‐area electron diffraction clearly revealed that the pyrochlore structure of CP transformed to the standard disordered cubic fluorite or tetragonal zirconia structure after having been subjected to a high‐temperature durability test; moreover, it was determined that this phase transformation moves inward from the crystallite surface. This discovery suggests a new method by which to improve upon this material for practical applications.
doi_str_mv 10.1111/jace.13322
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title Phase Transformation Behavior of a Pyrochlore‐Type CeO 2 –ZrO 2 Binary Compound
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