Crystal structure, thermal expansion and electrical conductivity of perovskite oxides BaxSr1-xCo0.8Fe0.2O3-delta (0.3 <= x <= 0.7)

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	Crystal structure, thermal expansion and electrical conductivity of perovskite oxides BaxSr1-xCo0.8Fe0.2O3-delta (0.3 <= x <= 0.7)
	B. Wei ; Z. Lu ; X. Q. Huang ; J. P. Miao ; X. Q. Sha ; X. S. Xin ; W. H. Su
刊名	Journal of the European Ceramic Society
	2006
卷号	26 期号:13 页码:2827-2832
关键词	perovskites (Ba SOFC cathodes Sr) (Co thermal expansion Fe)O-3 electrical conductivity oxygen permeation fuel-cells membranes transport coefficient diffusion stability ceramics gas
ISSN号	0955-2219
中文摘要	BaxSr1-xCo0.8Fe0.2O3-delta (0.3 <= x <= 0.7) composite oxides were prepared and characterized. The crystal structure, thermal expansion and electrical conductivity were studied by X-ray diffraction, dilatometer and four-point DC, respectively. For x <= 0.6 compositions, cubic perovskite structure was obtained and the lattice constant increased with increasing Ba content. Large amount of lattice oxygen was lost below 550 degrees C, which had significant effects on thermal and electrical properties. All the dilatometric curves had an inflection at about 350-500 degrees C, and thermal expansion coefficients were very high between 50 and 1000 degrees C with the value larger than 20 x 10(-6) degrees C-1. The conductivity were larger than 30 S cm(-1) above 500 degrees C except for x > 0.5 compositions. Furthermore, conductivity relaxation behaviors were also investigated at temperature 400-550 degrees C. Generally, Ba0.4Sr0.6Co0.8Fe0.2O3-delta and Ba0.5Sr0.5Co0.8Fe0.2O3-delta are potential cathode materials. (c) 2005 Elsevier Ltd. All rights reserved.
原文出处	://WOS:000239770600050
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/34553]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	B. Wei,Z. Lu,X. Q. Huang,et al. Crystal structure, thermal expansion and electrical conductivity of perovskite oxides BaxSr1-xCo0.8Fe0.2O3-delta (0.3 <= x <= 0.7)[J]. Journal of the European Ceramic Society,2006,26(13):2827-2832.
APA	B. Wei.,Z. Lu.,X. Q. Huang.,J. P. Miao.,X. Q. Sha.,...&W. H. Su.(2006).Crystal structure, thermal expansion and electrical conductivity of perovskite oxides BaxSr1-xCo0.8Fe0.2O3-delta (0.3 <= x <= 0.7).Journal of the European Ceramic Society,26(13),2827-2832.
MLA	B. Wei,et al."Crystal structure, thermal expansion and electrical conductivity of perovskite oxides BaxSr1-xCo0.8Fe0.2O3-delta (0.3 <= x <= 0.7)".Journal of the European Ceramic Society 26.13(2006):2827-2832.