セリア-ジルコニア固溶体の酸素貯蔵能に及ぼすセリウムイオン及びジルコニウムイオンの規則配列の影響

概要

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The CeO_2-ZrO_2 solid solution is the most important oxygen storage/release material for use in automobile catalysts. In particular, the ceria-zirconia solid solution with a pyrochlore structure exhibits the highest oxygen storage capacity (OSC). In this study, CeO_2-ZrO_2 solid solutions containing Y_2O_3 were synthesized and their OSCs were measured to clarify the influence of an ordered arrangement of Ce and Zr ions on the OSC. As a result of this study, it is concluded that an ordered arrangement of Ce and Zr ions markedly improves the OSC of CeO_2-ZrO_2 solid solutions.
社団法人日本セラミックス協会の論文
2004-11-01