CHEMICAL DIFFUSION IN POLYCRYSTALLINE CALCIUM-DOPED LANTHANUM CHROMITES

被引：40

作者：

YASUDA, I

HISHINUMA, M

机构：

[1] Fundamental Technology Research Laboratory, Tokyo Gas Co., Ltd., Minato-ku, Tokyo, 105, Shibaura

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1995年 / 115卷 / 01期

关键词：

D O I：

10.1006/jssc.1995.1114

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The chemical diffusion coefficient of polycrystalline calcium-doped lanthanum chromites, La1-xCaxCrO3-delta, was measured as a function of oxygen partial pressure, composition, and temperature by means of electrical conductivity relaxation. The measured chemical diffusivity increased with increasing oxygen vacancy concentration, the mechanism of which was discussed in light of defect chemical equilibrium. The derived vacancy diffusion coefficient was independent of the vacancy concentration, suggesting that oxygen vacancies were randomly distributed. (C) 1995 Academic Press, Inc.

引用

页码：152 / 157

页数：6

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