Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 8, Pages 9575-9582Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.05.076
Keywords
C. Ionic conductivity; C. Mechanical properties; D. Al2O3; E. Fuel cells
Categories
Funding
- National Natural Science Foundation of China [50902135]
- Natural Science Foundation of Ningbo [2010A610148]
- China Postdoctoral Science Foundation [2012M521208]
- Zhejiang Provincial Advanced Postdoctoral Scientific Program [Bsh1201010]
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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.
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