Oxygen transport in La0.6Sr0.4Co0.2Fe0.8O3-δ

被引：318

作者：

Lane, JA ^{[1
]}

Benson, SJ ^{[1
]}

Waller, D ^{[1
]}

Kilner, JA ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, Ceram Ion Conducting Membrane Grp, London SW7 2BP, England

来源：

SOLID STATE IONICS | 1999年 / 121卷 / 1-4期

关键词：

ionic conductivity; oxygen diffusion; oxygen surface exchange; conductivity relaxation; permeation; critical length;

D O I：

10.1016/S0167-2738(99)00014-4

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：

Oxygen transport and oxygen surface reaction measurements have been obtained for La0.6Sr0.4Co0.2Fe0.8O3-delta using the conductivity relaxation technique. These measurements are compared with tracer diffusion coefficients and surface exchange coefficients obtained for the same material. The change in oxygen stoichiometry of this material with temperature and oxygen partial pressure has been demonstrated. The values derived from these experiments have been used to calculate the theoretical oxygen fluxes and close agreement has been found with actual oxygen fluxes obtained from permeation experiments through a dense La0.6Sr0.4Co0.2Fe0.8O3-delta sample using a modified Wagner model. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：201 / 208

页数：8

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