MIXED CONDUCTIVITY IN TERBIA-STABILIZED BISMUTH OXIDE

被引：9

作者：

VINKE, IC ^{[1
]}

BOUKAMP, BA ^{[1
]}

DEVRIES, KJ ^{[1
]}

BURGGRAAF, AJ ^{[1
]}

机构：

[1] UNIV TWENTE,DEPT CHEM TECHNOL,INORGAN CHEM MAT SCI & CATALYSIS,POB 217,7500 AE ENSCHEDE,NETHERLANDS

来源：

SOLID STATE IONICS | 1992年 / 57卷 / 1-2期

关键词：

D O I：

10.1016/0167-2738(92)90068-Z

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：

The mixed conducting solid solution 0.75Bi2O3-0.25Tb4O7 (BT40) was studied by impedance techniques using ionically blocking electrodes. These Measurements confirmed the p-type electronic conductivity suggested in literature. In air at temperatures between 600 and 900 K the ionic transference number ranges from 0.28 to 0.70. The total conductivity at 833 K in air is 0.93 OMEGA-1 m-1. The activation enthalpy for the electronic conductivity varies from 77 kJ/mol in pure O2 to 83 kJ/mol in an ambient with P(O2) = 2 X 10(-4) atm. The electronic conductivity seems to be a function of the sample geometry and increases with decreasing cross section to height ratio. The activation enthalpy for the ionic conductivity being 110 kJ/mol, is independent of the P(O2) and does not depend on the sample geometry.

引用

页码：91 / 98

页数：8

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