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
	2006
发表期刊	Journal of the European Ceramic Society
ISSN	0955-2219
卷号	26 期号:13 页码:2827-2832
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.
部门归属	harbin inst technol, ctr condensed matter sci & technol, harbin 150001, peoples r china. heilongjiang provincial univ, harbin inst technol, key lab condensed matter sci & technol, harbin 150001, peoples r china. jilin univ, dept phys, changchun 130023, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;su, wh (reprint author), harbin inst technol, ctr condensed matter sci & technol, harbin 150001, peoples r china;suwenhui@hit.edu.cn
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
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WOS记录号	WOS:000239770600050
引用统计	被引频次：220[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34553
专题	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.