High-temperature thermal expansion and conductivity of cobaltites: potentials for adaptation of the thermal expansion to the demands for solid oxide fuel cells

被引：90

作者：

Uhlenbruck, S ^{[1
]}

Tietz, F ^{[1
]}

机构：

[1] Forschungszentrum Julich GmbH, Inst Mat & Proc Energy Syst, IWV, D-52425 Julich, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2004年 / 107卷 / 03期

关键词：

cobaltites; electron conduction; ionic conduction; thermal expansion; phase transitions; solid oxide fuel cell;

D O I：

10.1016/j.mseb.2003.11.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermal expansion and conductivity measurements of LaCoO3-delta, EuCoO3-delta, Y1-xCoO3-delta and Y1-xCo1-yMnO3-delta Perovskites are presented and compared with magnetization and magnetic susceptibility data. An analysis by means of a phenomenological model reveals the importance of the spin state transition and its dependence on changes of the lattice structure in cobaltites. The influence of the insulator-to-metal transition at high temperature on the thermal expansion is also discussed. The potential of these compounds as cathodes for solid oxide fuel cells (SOFCs) is evaluated. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：277 / 282

页数：6

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