Synthesis and characterization of gallium-based perovskite-type dense membrane with oxygen semipermeability

	Synthesis and characterization of gallium-based perovskite-type dense membrane with oxygen semipermeability
	Cong, Y; Shao, ZP; Yang, WS; Xiong, GX; Lin, LW
刊名	science in china series b-chemistry
	2001-06-01
卷号	44 期号:3 页码:294-303
关键词	perovskite Ga2O3 oxygen separation membrane La0.15Sr0.85Ga0.3Fe0.7O3-delta La0.15Sr0.85Co0.3Fe0.7O3-delta
英文摘要	la0.15sr0.85ga0.3fe0.7o3-delta (lsgfo) and la0.15sr0.85co0.3fe0.7o3-delta (lscfo) mixed oxygen-ion and electron conducting oxides were synthesized by using a combined edta and citrate complexing method, and the corresponding dense membranes were fabricated. the properties of the oxide powders and membranes were characterized with combined sem, xrd, h-2-tpr, o-2-tpd techniques, mechanical strength and oxygen permeation measurement. the results showed that lsgfo had much higher thermochemical stability than lscfo due to the higher valence stability of ga3+. after the temperature-programmed reduction by 5% h-2 in ar from 20 degreesc to 1020 degreesc, the basic perovskite structure of lsgfo was successfully preserved. lsgfo also favors the oxygen vacancy formation better than lscfo. oxygen permeation measurement demonstrated that lsgfo had higher oxygen permeation flux than lscfo, but they had similar activation energy for oxygen transportation, with a value of 110 and 117 kj . mol(-1), respectively the difference in oxygen permeation fluxes was correlated with the difference in oxygen vacancy concentrations for the two materials.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, multidisciplinary
研究领域[WOS]	chemistry
关键词[WOS]	oxides ; gas ; conversion ; methane ; syngas
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000169765500008
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/85861]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Cong, Y,Shao, ZP,Yang, WS,et al. Synthesis and characterization of gallium-based perovskite-type dense membrane with oxygen semipermeability[J]. science in china series b-chemistry,2001,44(3):294-303.
APA	Cong, Y,Shao, ZP,Yang, WS,Xiong, GX,&Lin, LW.(2001).Synthesis and characterization of gallium-based perovskite-type dense membrane with oxygen semipermeability.science in china series b-chemistry,44(3),294-303.
MLA	Cong, Y,et al."Synthesis and characterization of gallium-based perovskite-type dense membrane with oxygen semipermeability".science in china series b-chemistry 44.3(2001):294-303.