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.
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页码：1243 / 1249
页数：6
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