Electrical conductivity and structural stability of SrCo1-xFexO3-δ

被引：18
|
作者：
Wang, Zhifeng [1 ]
Zhao, Hailei [1 ]
Xu, Nansheng [1 ]
Shen, Yongna [1 ]
Ding, Weizhong [2 ]
Lu, Xionggang [2 ]
Li, Fushen [1 ]
机构：
[1] Univ Sci & Technol Beijing, Dept Inorgan Nonmetall Mat, Beijing 100083, Peoples R China
[2] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2011年 / 72卷 / 01期
关键词：
Inorganic compounds; Electrical conductivity; Thermodynamic properties; PEROVSKITE-TYPE OXIDES; OXYGEN PERMEATION; MAGNETIC-PROPERTIES; MEMBRANE REACTOR; SRCO0.8FE0.2O3-DELTA; TRANSPORT; LA1-XSRXCO1-YFEYO3; TRANSITIONS; METHANE; SYNGAS;
D O I：
10.1016/j.jpcs.2010.10.084
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Perovskite compounds in the system of SrCo1-xFexO3-delta (x=0.2, 0.4 and 0.6) were synthesized by solid state reaction. SrCo1-xFexO3-delta shows the p-type small polaron conduction behavior. Electrical conductivity and oxygen vacancy content decrease with increase in Fe content. The incorporation of Fe increases the structural stability of SrCo1-xFexO3-delta at low temperatures, while decreasing the structural stability at high temperatures. Oxygen partial pressure has a strong influence on electrical conductivity. At low oxygen partial pressure. SrCo1-xFexO3-delta will transform from cubic to orthorhombic structure. This structure can remain in 5% H-2/Ar only for a short time and then dissociates into Sr3Fe2O6.64 and Co due to the reduction of B-site elements. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：50 / 55
页数：6
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