TRACER DIFFUSION IN CHEMICAL-POTENTIAL GRADIENTS

被引：16

作者：

MARTIN, M ^{[1
]}

SCHMALZRIED, H ^{[1
]}

机构：

[1] UNIV HANOVER,SONDERFORSCH BERIECH 173,D-3000 HANOVER 1,FED REP GER

来源：

SOLID STATE IONICS | 1986年 / 20卷 / 01期

关键词：

COBALT COMPOUNDS - Electric Conductivity - CRYSTALS - Defects - IONS - Diffusion;

D O I：

10.1016/0167-2738(86)90037-8

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：

Simultaneous cation tracer diffusion and drift has been measured in cobalt oxide, which was exposed to an oxygen potential gradient. The drift of the tracer cations is due to the cation vacancy flux. The cobalt oxide crystal as a whole is therefore shifted in the oxygen potential gradient towards the higher oxygen potential. The motion of the cation tracers in the oxygen potential gradient is analyzed theoretically, and an average effective charge of the vacancies is found by comparison of experimental and theoretical tracer concentration profiles. No correlated vacancy motion could be detected in the applied oxygen potential gradient.

引用

页码：75 / 80

页数：6

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