Electrical and thermal properties of (Ba0.5Sr0.5) 1-xSmxCo0.8Fe0.2O3-delta perovskite oxides

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	Electrical and thermal properties of (Ba0.5Sr0.5) 1-xSmxCo0.8Fe0.2O3-delta perovskite oxides
	S. Y. Li; Z. Lu; X. Q. Huang; B. Wei; W. H. Su
	2007
发表期刊	Solid State Ionics
ISSN	0167-2738
卷号	178 期号:5-6 页码:417-422
摘要	(Ba0.5Sr0.5) 1-xSmxCo0.8Fe0.2O3-delta (BSSCF; 0.05 <= x <= 0.20) compounds were synthesized and characterized by powder X-ray diffraction (XRD), thermogravimetric (TG), electrical conductivity, and thermal expansion coefficient (TEC) measurements. An emphasis is made on the effect of Sm-doping on the material's properties. XRD measurments showed that the BSSCF sample had a cubic perovskite structure, while TG measurements proved the loss of lattice oxygen during heating up. The electrical conductivity increased with temperature up to about 350-450 degrees C, and then decreased due to the loss of lattice oxygen. Additionally, the lattice oxygen loss caused the differences in electrical conductivity on heating up and cooling down. Electrical conductivity relaxation measurements were performed on the x = 0.10, 0.20 samples at 450, 470, and 500 degrees C, and showed that the diffusion coefficient decreased with increasing content of Sm. The TEC values of BSSCF were 19.5-20.1 x 10(-6) K-1 from 30 to 800 degrees C. (c) 2006 Elsevier B.V. All rights reserved.
部门归属	harbin inst technol, ctr condensed matter sci & technol, harbin 150001, peoples r china. harbin inst technol, heilongjiang provincial univ, key lab condensed matter sci & technol, harbin 150001, peoples r china. jilin univ, dept condensed matter phys, changchun 130023, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;li, sy (reprint author), harbin inst technol, ctr condensed matter sci & technol, harbin 150001, peoples r china;lsy614@21cn.com suwenhui@hit.edu.cn
关键词	Perovskite Cathode Conductivity Thermal Expansion Coefficient (Bao(0.5)Sr(0.5)) 1-xsmxco0.8fe0.2o3-delta Intermediate Temperature Sofcs Fuel-cells Oxygen Permeation Cathode Materials Crystal-structure Partial Oxidation Transport Membranes Ba0.5sr0.5co0.8fe0.2o3-delta Diffusion
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WOS记录号	WOS:000245846600015
引用统计	被引频次：47[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/321006/33650
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Y. Li,Z. Lu,X. Q. Huang,et al. Electrical and thermal properties of (Ba0.5Sr0.5) 1-xSmxCo0.8Fe0.2O3-delta perovskite oxides[J]. Solid State Ionics,2007,178(5-6):417-422.
APA	S. Y. Li,Z. Lu,X. Q. Huang,B. Wei,&W. H. Su.(2007).Electrical and thermal properties of (Ba0.5Sr0.5) 1-xSmxCo0.8Fe0.2O3-delta perovskite oxides.Solid State Ionics,178(5-6),417-422.
MLA	S. Y. Li,et al."Electrical and thermal properties of (Ba0.5Sr0.5) 1-xSmxCo0.8Fe0.2O3-delta perovskite oxides".Solid State Ionics 178.5-6(2007):417-422.