Phase composition, oxidation state and electrical conductivity of SrFe1.5-xCoxOy

被引：25

作者：

Deng, ZQ ^{[1
]}

Zhang, GG ^{[1
]}

Liu, W ^{[1
]}

Peng, DK ^{[1
]}

Chen, CS ^{[1
]}

机构：

[1] Univ Sci & Technol China, Internal Frict & Defects Solids Lab, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China

来源：

SOLID STATE IONICS | 2002年 / 152卷

基金：

中国国家自然科学基金;

关键词：

dense membrane; mixed conductor; electrical conductivity; phase composition;

D O I：

10.1016/S0167-2738(02)00317-X

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：

Mixed ionic and electronic conducting oxides SrFe1.5-xCoxOy (x = 0-0.6) were investigated. In the layered Sr-4(Fe,Co)(6)O13-delta, phase dominant region (x < 0.375), the average valence of the transition metals (Fe,Co) determined by iodometric titration decreases monotonically with increasing cobalt content and varies slightly with temperature. In the multiphase region (x. 0,375), the valence changes significantly with temperature. The electrical conductivity increases with increasing cobalt content. Unusual changes in electrical conductivity were observed at similar to 900 degreesC in the multiphase region, which may be associated with the conversion of the contained perovskite phase into the layered phase. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：735 / 739

页数：5

共 13 条

[1] REVIEW OF P-TYPE DOPED PEROVSKITE MATERIALS FOR SOFC AND OTHER APPLICATIONS [J].