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题名: Crystal structure and oxygen permeation study of cobalt doped Sr4Fe6O13 mixed-conducting oxides
作者: Dong, H;  Shao, ZP;  Xiong, GX;  Yang, WS
关键词: mixed-conducting oxide ;  cellulose ;  Sr4CoxFe6-O-x(13 +/-delta) ;  phase structure ;  oxygen separation
刊名: JOURNAL OF INORGANIC MATERIALS
发表日期: 2001-03-01
卷: 16, 期:2, 页:311-318
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Materials Science, Ceramics
研究领域[WOS]: Materials Science
英文摘要: Mixed-conducting Sr4CoxFe6-xO13+/-delta oxides were synthesized by pyrolysis of cellulose-citric-metal salt compound. Their crystal structures were investigated, and oxygen permeability of Sr4Co2Fe4O13+/-delta was also studied by a GC method. The introduction of cobalt in Sr4Fe6O13 led to the occurrence of perovskite phase in the Sr4Fe6O13 bulk even at low doping content of cobalt (x=0.5), some minor CoO phase was also observed when x=2.0, and the material mainly demonstrated perovskite structure when x=2.6. The phase structure of Sr4COxFe6-xO13+/-delta was found to be closely related with the calcined temperature and the oxygen concentration in the ambient atmosphere during calcination or retreatment at high temperature. The air-synthesized sample had the intergrowth phase Sr4Fe6-xCoxO13+/-delta and the perovskite phase Sr(Fe, Co)O3-delta coexisted along with CoO impurity. The N-2-annealed sample coexisted of Sr4Fe6O13 phase, brownmillerite phase and minor CoO impuirty. When Sr4Co2Fe4O13+/-delta was treated in pure oxygen environment, the sample changed to single phase (Sr4Fe6O13 type phase). The oxygen permeability of Sr4Co2Fe4O13+/-delta membrane had a value close to 1.5x10(-8)mol/cm(2).s at 1123K. From 923K to 1223K, the activation energy for oxygen transportation was about 70kJ/mol.
关键词[WOS]: CERAMIC MEMBRANE ;  STABILITY ;  METHANE ;  SYNGAS
语种: 英语
WOS记录号: WOS:000167638500019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138970
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:
Dong, H,Shao, ZP,Xiong, GX,et al. Crystal structure and oxygen permeation study of cobalt doped Sr4Fe6O13 mixed-conducting oxides[J]. JOURNAL OF INORGANIC MATERIALS,2001,16(2):311-318.
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