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题名: Crystal structure, oxygen permeability and stability of Ba0.5Sr0.5Co0.8Fe0.1M0.1O3-delta (M = Fe, Cr, Mn, Zr) oxygen-permeable membranes
作者: Lu, H;  Tong, JH;  Deng, ZQ;  Cong, Y;  Yang, WS
关键词: ceramics membrane ;  oxygen permeability ;  stability ;  X-ray diffraction ;  crystal structure
刊名: MATERIALS RESEARCH BULLETIN
发表日期: 2006-04-13
DOI: 10.1016/j.materresbull.2005.10.017
卷: 41, 期:4, 页:683-689
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Materials Science, Multidisciplinary
研究领域[WOS]: Materials Science
英文摘要: Oxygen-permeable ceramic membrane materials of the Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCFO) and partially Fe-substituted Ba0.5Sr0.5Co0.8Fe0.1M0.1O3-delta (M = Cr, Mn, Zr) were synthesized by solid-state reaction method. These materials possess purely cubic perovskite structure with the exception of Ba0.5Sr0.5C0.8Fe0.1M0.1O3-delta (M = Mn, Zr), in which minor impufities exist. Oxygen permeability across these dense membrane disks were measured under an air[He oxygen partial pressure gradient in the temperature range of 973-1123 K. The results demonstrated that the oxygen permeation fluxes of the Ba0.5Sr0.5Co0.8Fe0.1M0.1O3-delta (M = Fe, Cr, Mn, Zr) membranes increased in the following order: Fe (BSCFO) > Cr > Zr > Mn. The corresponding activation energies for oxygen permeation of Ba0.5Sr0.5Co0.8Fe0.1M0.1O3-delta (M = Fe, Cr, Zr) membranes were calculated to be similar (53 +/- 4 kJ/mol), which was remarkably lower than that (99 +/- 3 kJ/mol) of Ba0.5Sr0.5Co0.8Fe0.1M0.1O3-delta (M = Mn) membrane. In addition, good oxygen permeation stability of the Ba0.5Sr0.5Co0.8Fe0.1M0.1O3-delta (M = Cr) membrane was achieved at the temperature lower than 1123 K. The X-ray diffraction (XRD) and differential thermal analysis (DTA) experiments showed that the structural stability of BSCFO could be significantly improved when Fe ions in the BSCFO material were partially substituted by Cr, Mn or Zr ions. (c) 2005 Elsevier Ltd. All rights reserved.
关键词[WOS]: PEROVSKITE-TYPE OXIDES ;  PARTIAL OXIDATION ;  BA0.5SR0.5CO0.8FE0.2O3-DELTA MEMBRANE ;  CERAMIC MEMBRANES ;  SYNTHESIS GAS ;  METHANE ;  DENSE ;  CONDUCTIVITY ;  REACTORS ;  NONSTOICHIOMETRY
语种: 英语
WOS记录号: WOS:000236660000001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140004
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Lu, H,Tong, JH,Deng, ZQ,et al. Crystal structure, oxygen permeability and stability of Ba0.5Sr0.5Co0.8Fe0.1M0.1O3-delta (M = Fe, Cr, Mn, Zr) oxygen-permeable membranes[J]. MATERIALS RESEARCH BULLETIN,2006,41(4):683-689.
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