Oxygen permeability of LaFe1-xNixO3-δ solid solutions

被引：95
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
收藏
页码：1311 / 1317
页数：7
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