Store and Release of Oxygen of Ceria-Zirconia Solid Solution Synthesized by Solid Phase Reaction at Near Room Temperature
Store and Release of Oxygen of Ceria-Zirconia Solid Solution Synthesized by Solid Phase Reaction at Near Room Temperature
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近室温固相反应合成氧化铈-氧化锆固溶体氧的储存与释放
DOI：
10.2109/jcersj.109.1267_177
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发表时间：
2001
影响因子：
1.1
通讯作者：
M. Sugiura
中科院分区：
文献类型：
--
作者：
A. Suda;H. Sobukawa;Tadashi Suzuki;T. Kandori;Y. Ukyo;M. Sugiura
用Pt质量为1mass%的热重仪测定了磨磨法制备的氧化锆固溶体的储氧和释氧能力，并对采用常规的氧化锆粉加锆盐加热法制备的氧化锆固溶体进行了表征和比较。磨料磨法制备的二氧化锆固溶体的储氧和释氧能力是常规法制备样品的3倍左右。在氧化锆-氧化锆固溶体中氧储放能力与氧化锆含量的关系中，锆含量为100%的点对应于固溶体中所含全部铈离子的价为3的状态。这说明氧化锆溶入二氧化铈后储放氧能力增加的机理是由于铈离子的还原，使体积小于4价铈离子的锆离子释放膨胀引起的应变。
Capability of oxygen store and release of ceria-zirconia solid solution made by attrition mill process was measured by thermo-gravimeter with 1mass% of Pt. Ceria-zirconia solid solution made by conventional heating method of ceria powder with zirconium salt was also characterized for comparison. Capability of oxygen store and release of ceria-zirconia solid solution made by attrition mill process is about three times larger than that of conventionally made samples. And, the point, where zirconium content is 100% on the relation between capability of oxygen store and release and zirconia content in the ceria-zirconia solid solution, corresponds to the state in which the valence of all the cerium ion being contained in the solid solution is 3. This fact suggests that the mechanism, that the increase of capability of oxygen store and release by dissolving zirconia into ceria, is that zirconium ions, which are smaller than cerium ions of the valence 4, release the strain caused by the expansion due to a reduction of cerium ions.