Oxygen transport in La0.6Sr0.4Co1-yFeyO3-δ

被引：217

作者：

Bouwmeester, HJM ^{[1
]}

Den Otter, MW ^{[1
]}

Boukamp, BA ^{[1
]}

机构：

[1] Univ Twente, MESA Inst Nanotechnol, Dept Sci & Technol, NL-7500 AE Enschede, Netherlands

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2004年 / 8卷 / 09期

关键词：

chemical diffusion; conductivity relaxation; mixed ionic-electronic conductors; perovskites; surface exchange;

D O I：

10.1007/s10008-003-0488-3

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The surface exchange coefficient and chemical diffusion coefficient of oxygen for the perovskites La0.6Sr0.4Co1-yFeyO3-delta (y=0.2, 0.5 and 0.8) were measured using the conductivity relaxation technique. Measurements were performed between 600 and 800 degreesC in an oxygen partial pressure range between 10(-4) and 1 bar. Both transport coefficients decrease markedly with decreasing oxygen partial pressure below about 10(-2) bar at all temperatures. This is attributed to ordering of oxygen vacancies. Implications for using La0.6Sr0.4Co1-yFeyO3-delta as an oxygen separation membrane are discussed.

引用

页码：599 / 605

页数：7

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