The influence of cation non-stoichiometry on the properties of undoped and gadolinia-doped barium cerate

被引：197

作者：

Shima, D ^{[1
]}

Haile, SM ^{[1
]}

机构：

[1] UNIV WASHINGTON,DEPT MAT SCI & ENGN,SEATTLE,WA 98195

来源：

SOLID STATE IONICS | 1997年 / 97卷 / 1-4期

关键词：

BaCeO3; stoichiometry; barium cerate; proton conduction; defect chemistry;

D O I：

10.1016/S0167-2738(97)00029-5

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：

The influence of A:B cation non-stoichiometry on the structural and electrical properties of BaCeO3 and of 15% Gd-doped BaCeO3 has been investigated. X-ray powder diffraction and water uptake measurements suggest the occupation of Ba sites by Gd in barium-deficient, doped materials. This phenomenon is exacerbated by high temperature processing, which causes additional loss of barium. The relationship between defect chemistry, stoichiometry and conductivity, as measured by a.c. impedance spectroscopy, is discussed.

引用

页码：443 / 455

页数：13

共 24 条

[1] PEROVSKITE SOLID ELECTROLYTES - STRUCTURE, TRANSPORT-PROPERTIES AND FUEL-CELL APPLICATIONS [J].