Oxygen permeability of LaFe1-xNixO3-δ solid solutions

被引：96

作者：

Kharton, VV ^{[1
]}

Viskup, AP ^{[1
]}

Naumovich, EN ^{[1
]}

Tikhonovich, VN ^{[1
]}

机构：

[1] Belarusian State Univ, Inst Physicochem Problems, Minsk 220050, BELARUS

来源：

MATERIALS RESEARCH BULLETIN | 1999年 / 34卷 / 08期

关键词：

ceramics; oxides; electrical properties; ionic conductivity; thermal expansion;

D O I：

10.1016/S0025-5408(99)00117-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Incorporation of nickel into the iron sublattice of LaFeO3-delta was found to result in increasing oxygen nonstoichiometry, electrical conductivity, and thermal expansion of the perovskites. Activation energy for electrical conductivity of the LaFe1-xNixO3-delta (x = 0.2-0.5) decreases with x in the range from 23.9 to 6.6 kJ/mol. Thermal expansion coefficients of the ceramic materials calculated from the dilatometric data were (8.9-11.9) x 10(-6) K-1. Oxygen permeation through LaFe1-xNixO3-delta membranes was found to increase with nickel content due to increasing oxygen vacancy concentration and bulk ionic conductivity, which are the permeation flux-limiting factors. (C) 1999 Elsevier Science Ltd.

引用

页码：1311 / 1317

页数：7

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