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Crystal structure and oxygen permeation study of cobalt doped Sr4Fe6O13 mixed-conducting oxides
Dong, H; Shao, ZP; Xiong, GX; Yang, WS
KeywordMixed-conducting Oxide Cellulose Sr4coxfe6-o-x(13 +/-delta) Phase Structure Oxygen Separation
Source PublicationJOURNAL OF INORGANIC MATERIALS
2001-03-01
Volume16Issue:2Pages:311-318
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
WOS SubjectMaterials Science, Ceramics
WOS Research AreaMaterials Science
WOS KeywordCERAMIC MEMBRANE ; STABILITY ; METHANE ; SYNGAS
AbstractMixed-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.
Language英语
WOS IDWOS:000167638500019
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/138970
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
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.
APA Dong, H,Shao, ZP,Xiong, GX,&Yang, WS.(2001).Crystal structure and oxygen permeation study of cobalt doped Sr4Fe6O13 mixed-conducting oxides.JOURNAL OF INORGANIC MATERIALS,16(2),311-318.
MLA Dong, H,et al."Crystal structure and oxygen permeation study of cobalt doped Sr4Fe6O13 mixed-conducting oxides".JOURNAL OF INORGANIC MATERIALS 16.2(2001):311-318.
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