書誌事項
- タイトル別名
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- Effect of Specific Surface Area of Ceria-Zirconia Solid Solutions on Their Oxygen Storage Capacity
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説明
The oxygen storage capacity (OSC) of a ceria-zirconia(CeO2-ZrO2) solid solution containing 50 mol% ZrO2 is approximately 400 μmol-O2/g, which corresponds to approximately 50% of the theoretical OSC limit calculated from the valence change of the Ce ion. There are two possible explanations for the OSC suppression of approximately 50% of the theoretical OSC limit. The first mechanism is based on the thermodynamic reaction equilibrium; the second one is based on chemical kinetics. To clarify the reason for the suppression, the effect of the specific surface area of CeO2-ZrO2 solid solutions was estimated by measuring the OSC of CeO2-ZrO2 solid solutions with 3 levels of specific surface area. OSC was independent of the specific surface area of the CeO2-ZrO2 solid solutions in the composition range ≥60 mol% ZrO2. The amount of bulk oxygen, which is released from inside the crystal lattice, could be estimated to be constant even though the specific surface area of the material changed in the composition range ≤50 mol% ZrO2. Therefore, the mechanism of the OSC suppression was the thermodynamic equilibrium of the redox reaction of CeO2-ZrO2 solid solutions.<br>
収録刊行物
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- Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌)
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Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) 112 (1311), 581-585, 2004
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680225168768
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- NII論文ID
- 110002288263
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- NII書誌ID
- AN10040326
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- COI
- 1:CAS:528:DC%2BD2cXhtVKhu7bK
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- ISSN
- 18821022
- 09145400
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- NDL書誌ID
- 7140130
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDLサーチ
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