Electron hole conductivity of gadolinia doped ceria

被引：13

作者：

Figueiredo, FM ^{[1
]}

Marques, FMB ^{[1
]}

Frade, JR ^{[1
]}

机构：

[1] Univ Aveiro, UIMC, Dept Ceram & Glass Engn, P-3810 Aveiro, Portugal

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 1999年 / 19卷 / 6-7期

关键词：

electromechanical permeability; electrical properties; electrical conductivity; CeO2; fuel cells;

D O I：

10.1016/S0955-2219(98)00320-3

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The electron hole conductivity of gadolinia doped ceria (GCO) was estimated from electrochemical permeability measurements, at temperatures in the range of 800 to 1000 degrees C. The transient behaviour of the cell (while recovering from reducing to oxidising conditions) was used to assess the accuracy of the experimental procedure, and some of these results still suggested the presence of leaks in the sealings. However, the temperature dependence of steady state results indicates that electrochemical permeability prevails, and these results were thus used to estimate the hole conductivity. These results showed that the hole conductivity of GCO at 1000 degrees C is about two orders of magnitude higher than reported for yttria stabilized zirconia, and the activation energy (129 kJ mol(-1)) is slightly lower. (C) 1999 Elsevier Science Limited. All rights reserved.

引用

页码：807 / 810

页数：4

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