A new approach to the defect chemistry of doped LA1-Δ MNO3+δ

被引：0
|
作者：
Nakamura, K [1 ]
机构：
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
MIXED IONIC ELECTRONIC CONDUCTING PEROVSKITES FOR ADVANCED ENERGY SYSTEMS | 2004年 / 173卷
关键词：
defect chemistry; LaMnO3; perovskite; excess oxygen; cation vacancy;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Oxygen and cation non-stoichiometries in the doped LaMnO3+8 have been treated using a simple defect model considering entropy of mixing of vacancies and holes. This simple defect model can reasonably explain the contrasting oxygen reduction effects observed in the La deficient and Sr (Ca) doped manganites. This model also insists that excess Mn (or La) ions in the La1-DeltaMnO3+delta (or LaMn1-DeltaO3+delta) enter into the counter ion sites to give both La and Mn site vacancies.
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收藏
页码：199 / 212
页数：14
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