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题名: Germanium and iron co-substituted SrCoO2.5+delta as oxygen permeable membrane
作者: Deng, ZQ;  Liu, W;  Chen, CS;  Lu, H;  Yang, WS
关键词: dense membrane ;  phase transition ;  oxygen permeability ;  electrical conductivity
刊名: SOLID STATE IONICS
发表日期: 2004-05-31
DOI: 10.1016/j.ssi.2004.04.006
卷: 170, 期:3-4, 页:187-190
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Condensed Matter
研究领域[WOS]: Chemistry ;  Physics
英文摘要: Germanium and iron co-doped SrCoO2.5 + (delta) was investigated in terms of phase stability, oxygen permeability and electrical conductivity. The favorable high-temperature cubic structure of SrCoO2.5 + delta was stabilized to lower temperatures by co-doping Ge (10 mol%) and Fe (10 mol%) that substituted for Co, which however could not be achieved by doping Ge (20 mol%) alone. In contrast to SrCo0.8Ge0.2O2.5 (+ delta) sample which showed a sharp decrease in oxygen permeability at temperature of similar to875 degreesC upon cooling, SrGe0.1Co0.8Fe0.1O3-delta sample remained well-permeable to oxygen at lower temperatures down to at least 820 degreesC; an abrupt change in electrical conductivity in SrCo0.8Ge0.2O2.5 (+ delta) also occurred accompanying the phase transition. The oxygen permeation flux for SrGe0.1Co0.8Fe0.1O3 - delta increased significantly with the decrease of the membrane thickness, indicating the transport of oxygen ions in the bulk of the membrane as the rate-limiting step. (C) 2004 Elsevier B.V. All rights reserved.
关键词[WOS]: PEROVSKITE-TYPE OXIDES ;  ELECTRICAL-CONDUCTIVITY ;  PERMEATION ;  SYSTEM
语种: 英语
WOS记录号: WOS:000222622500005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139394
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
2.Univ Sci & Technol China, Dept Mat Sci & Engn, Lab Adv Funct Mat & Devices, Hefei 230026, Anhui, Peoples R China

Recommended Citation:
Deng, ZQ,Liu, W,Chen, CS,et al. Germanium and iron co-substituted SrCoO2.5+delta as oxygen permeable membrane[J]. SOLID STATE IONICS,2004,170(3-4):187-190.
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