Effect of alumina on the properties of ceria and scandia co-doped zirconia for electrolyte-supported SOFC

被引：38

作者：

Guo, Cun Xin ^{[1
]}

Wang, Jian Xin ^{[1
]}

He, Chang Rong ^{[1
]}

Wang, Wei Guo ^{[1
]}

机构：

[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Div Fuel Cell & Energy Technol, Ningbo 315201, Zhejiang, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 08期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

C. Ionic conductivity; C. Mechanical properties; D; Al2O3; E. Fuel cells; YTTRIA-STABILIZED ZIRCONIA; OXIDE FUEL-CELLS; ELECTRICAL-CONDUCTIVITY; MECHANICAL-PROPERTIES; COMPOSITES; PHASE; MICROSTRUCTURES; IMPEDANCE;

D O I：

10.1016/j.ceramint.2013.05.076

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 properties of ceria and scandia co-doped zirconia electrolytes with different alumina additions were investigated. Microstructure analysis revealed that alumina was an effective sintering aid for ceria and scandia co-doped zirconia. Small addition ( < 0.5 wt%) of alumina slightly increased the bulk conductivity. The grain boundary resistance was reduced significantly by alumina addition. Scavenging effect was observed at the grain boundary by element analysis resulting in about 20% increase in the specific grain boundary conductivity. Notable improvement in the flexural strength was measured after the addition of alumina. The sample with 0.5 wt% alumina, exhibiting enhanced grain boundary conductivity and flexural strength, was potential for the application in electrolyte-supported SOFC. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：9575 / 9582

页数：8

共 34 条

[1]

Aoki M., 2005, J AM CERAM SOC, V79, P1169

[2] Electrical conductivity of ZrO2-Sc2O3 doped with HfO2, CeO2, and Ga2O3 [J].