SURFACE-AREA STABILITY OF LANTHANUM-DOPED CERIA

被引：15
|
作者：
PIJOLAT, M [1 ]
PRIN, M [1 ]
SOUSTELLE, M [1 ]
TOURET, O [1 ]
NORTIER, P [1 ]
机构：
[1] RHONE POULENC RECH, CRA, F-93308 AUBERVILLIERS, FRANCE
来源：
SOLID STATE IONICS | 1993年 / 63-5卷
关键词：
D O I：
10.1016/0167-2738(93)90196-A
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
High surface area ceria was doped with lanthanum ions and calcined at 900 K under various partial pressures of oxygen and water vapour. The kinetic rates of crystallite size increase were observed to vary as P(O2)-1/6. By addition of 0.5 and 1% of lanthanum ions, the rates were lowered, and then significantly decreased for 10% (cat.). A model of this process involved association between lanthanum ions and oxygen vacancies in order to explain the better stability of doped ceria.
引用
收藏
页码：781 / 785
页数：5
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