Phase relations of BaCoO3 (- delta)-BaInO2.5 and size variation effect   of B-site cations on the phase transitions

doi:10.1016/j.ssi.2010.12.007

CORC > 北京大学 > 化学与分子工程学院

	Phase relations of BaCoO3 (- delta)-BaInO2.5 and size variation effect of B-site cations on the phase transitions
	Li, Kuo ; Wang, Yingxia ; Lin, Jianhua ; Li, Zhaofei
刊名	solid state ionics
	2011
关键词	Perovskite Ba2In2O5 Brownmillerite Size variance Phase transition Conductivity OXIDE-ION CONDUCTIVITY BA2IN2O5 PEROVSKITE SYSTEM (BA1-XLAX)(2)IN2O5+X BROWNMILLERITE DIFFRACTION VARIANCE
DOI	10.1016/j.ssi.2010.12.007
英文摘要	The phase relations in the system of BaCoO3 (-) (delta)-BaInO2.5 in the temperature range 800-1150 degrees C were investigated and five phases with perovskite or its related structures were identified. In the range of 1050 to 1150 degrees C, there exists a wide solid solution BaInxCo1 - xOy(0.1 <= x <= 0.84, 2.54 <= y <= 2.59) with the cubic perovskite structure. At 1050 degrees C, the cubic phase transforms to an orthorhombic phase firstly at x = 0.55 and the cubic solid solution is separated into two regions, and narrowed with the decrease of the temperature. The structure of the cubic phase in In-rich region appears as a super-lattice (a') of the simple cubic phase (a(p)) with the modulation vector a'=2a(p). At 950 degrees C. a tetragonal phase BaIn0.64Co0.36Oy emerges and extends to a solid solution at lower temperature. The orthorhombic and tetragonal structures are studied by electron diffraction and powder X-ray Rietveld analysis. The size variance of B-site cations was applied to interpret the phase transition from the cubic to the orthorhombic at x = 0.55 for compounds BaInxCo1 - xOy. The cubic solid solution shows good conductivities at low temperature. (C) 2010 Elsevier B.V. All rights reserved.; Chemistry, Physical; Physics, Condensed Matter; SCI(E); EI; 2; ARTICLE; 1; 7-15; 183
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/151114]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Li, Kuo,Wang, Yingxia,Lin, Jianhua,et al. Phase relations of BaCoO3 (- delta)-BaInO2.5 and size variation effect of B-site cations on the phase transitions[J]. solid state ionics,2011.
APA	Li, Kuo,Wang, Yingxia,Lin, Jianhua,&Li, Zhaofei.(2011).Phase relations of BaCoO3 (- delta)-BaInO2.5 and size variation effect of B-site cations on the phase transitions.solid state ionics.
MLA	Li, Kuo,et al."Phase relations of BaCoO3 (- delta)-BaInO2.5 and size variation effect of B-site cations on the phase transitions".solid state ionics (2011).