Correlation of thermal properties and electrical conductivity of La0.7Sr0.3Cu0.2Fe0.8O3−δ material for solid oxide fuel cells

被引：0

作者：

Jürgen Wackerl

Thomas Koppitz

Dong-Hyun Peck

Sang-Kuk Woo

Torsten Markus

机构：

[1] Forschungszentrum Jülich GmbH,

[2] Korea Institute of Energy Research (KIER),undefined

来源：

Journal of Applied Electrochemistry | 2009年 / 39卷

关键词：

Cathode; Oxygen stoichiometry; Mixed conductor; SOFC; Perovskite;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A copper-doped ferrite with the chemical composition La0.7Sr0.3Cu0.2Fe0.8O3−δ (LaSrCuFe) was prepared using the classical ceramics method starting from the oxides. The linear thermal expansion coefficient in air was measured in the temperature range between 550 and 1,250 K to be between 10 × 10−6 and 15 × 10−6 K−1. The electrical conductivity in air was found to be higher than 100 S cm−1 for temperatures lower than 1,100 K. A change of oxygen stoichiometry was found above 650 K in an atmosphere of 20 vol% oxygen with argon. This change can be correlated with the electrical conductivity.

引用

页码：1243 / 1249

页数：6