Oxygen ionic transport in a-site-deficient perovskites La(Pb)FeO3

被引：25

作者：

Kharton, VV ^{[1
]}

Viskup, AP ^{[1
]}

Naumovich, EN ^{[1
]}

Tonoyan, AA ^{[1
]}

Reut, OP ^{[1
]}

机构：

[1] Belarusian State Univ, Inst Physicochem Problems, Minsk 220080, BELARUS

来源：

MATERIALS RESEARCH BULLETIN | 1998年 / 33卷 / 07期

关键词：

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

D O I：

10.1016/S0025-5408(98)00068-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Formation of perovskite-type solid solutions were found in the oxide system La1-xPbxFeO3-delta (x = 0.1-0.3). Synthesis and sintering of the ceramics at temperatures above 1300 K led to a cation deficiency in the lanthanum sublattice, due to lead oxide evaporation. Electrical conductivity and oxygen permeation fluxes were ascertained to increase with increasing x. Oxygen permeability values of the La1-xPbxFeO3-delta cation-deficient ceramics were considerably less than those of La1-xSrxFeO3-delta. Permeation fluxes through La1-xPbxFeO3-delta were demonstrated to be limited by the bulk ionic conductivity. Thermal expansion coefficients of the oxides were (10.0-10.4) x 10(-6) K-1. (C) 1998 Elsevier Science Ltd.

引用

页码：1087 / 1093

页数：7

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