Electrical and structural properties of Ce0.8(Sm0.5-xY0.5Alx)0.2O2-δ ceramics as an electrolyte for SOFC

被引：2
作者：
Lee, Seung-Hwan [1 ]
Kim, Hong-Ki [1 ]
Kim, Seung-Hyun [1 ]
Lee, Sung-Gap [2 ]
Lee, Young-Hie [1 ]
机构：
[1] Kwangwoon Univ, Dept Elect Mat Engn, Seoul, South Korea
[2] Gyeongsang Natl Univ, Dept Ceram Engn, Jinju, South Korea
来源：
MATERIALS RESEARCH BULLETIN | 2014年 / 58卷
关键词：
Ceramics; Impedance spectroscopy; X-ray diffraction; Electrical properties; Ionic conductivity; BRICK LAYER MODEL; DOPED CERIA; IONIC-CONDUCTIVITY; LA; GD; SM; MICROSTRUCTURES;
D O I：
10.1016/j.materresbull.2014.05.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of various contents of alumina co-doping on a ceria-based electrolyte were investigated. All samples were sintered at 1500 degrees C for 10 h. The X-ray diffraction (XRD) patterns showed a fluorite cubic structure. To investigate the surfaces of the Ce-0.8(Sm0.5-xY0.5Alx)(0.2)O2-delta (CSYA) ceramics by scanning electron microscopy (SEM), the electrical properties of the CSYA ceramics were measured by AC impedance. The optimal values of ionic conductivity and activation energy were reached at x=0.4 measured at 600 degrees C. This result indicated that the alumina co-doping improved the electrical and microstructural properties of the ceria-based electrolyte. (C) 2014 Elsevier Ltd. All rights reserved.
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收藏
页码：195 / 198
页数：4
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