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

共 13 条

[1] CHEMLA M, 1956, ANN PHYS, V13, P959
[2] COBALTOUS OXIDE POINT-DEFECT STRUCTURE AND NONSTOICHIOMETRY, ELECTRICAL-CONDUCTIVITY, COBALT TRACER DIFFUSION
DIECKMANN, R
[J]. ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-FRANKFURT, 1977, 107 (02): : 189 - 210
[3] GRADSTEIN I, 1981, TABLES SERIES PRODUC
[4] HOLSCHER U, 1984, Z PHYS CHEM NEUE FOL, V139, P69
[5] MANNING JR, 1969, DIFFUSION SOLIDS
[6] COBALTOUS OXIDE IN AN OXYGEN POTENTIAL GRADIENT - MORPHOLOGICAL STABILITY OF THE PHASE BOUNDARIES
MARTIN, M
SCHMALZRIED, H
[J]. BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1985, 89 (02): : 124 - 130
[7] INTERNAL REACTIONS IN OXIDE SOLID-SOLUTIONS
OSTYN, KM
CARTER, CB
KOEHNE, M
FALKE, H
SCHMALZRIED, H
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1984, 67 (10) : 679 - 685
[8] CHEMICAL DIFFUSION-COEFFICIENT MEASUREMENTS IN PURE AND LITHIUM DOPED COBALTOUS OXIDE
PETOTERVAS, G
RADJI, O
SOSSA, B
OCHIN, P
[J]. RADIATION EFFECTS AND DEFECTS IN SOLIDS, 1983, 75 (1-4): : 301 - 308
[9] CRYSTALLINE OXIDE SOLID-SOLUTIONS IN OXYGEN POTENTIAL GRADIENTS
SCHMALZRIED, H
LAQUA, W
LIN, PL
[J]. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 1979, 34 (02): : 192 - 199
[10] THERMODYNAMICS OF COMPOUNDS WITH NARROW RANGES OF NONSTOICHIOMETRY
SCHMALZRIED, H
[J]. BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1983, 87 (09): : 726 - 733

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