| Preparation and oxygen permeation properties of SrFe（Cu）O3-δ dense ceramic membranes |
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| 作者单位： | Heng Zhang,Tingting Wang(School of Chemistry and Chemical Engineering,Qufu Normal University,Qufu 273165,Shandong,China);Xinfa Dong,Weiming Lin(School of Chemical and Energy Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China)
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| 基金项目： | 广东省自然科学基金，the Science and Technology Program of Guangdong Province |
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| 摘 要： | Mixed oxygen-ionic and electronic conducting membranes of SrFe(Cu)O3−δ were prepared by solid-state reaction method. The crystal
structure, oxygen nonstoichiometry, and phase stability of the materials were studied by TGA and XRD. Oxygen permeation fluxes through
these membranes were studied at operating temperature ranging from 750 to 950 ℃. Results showed that doping Cu in SrFeO3−δ compound
had a significant effect on the formation of single-phased perovskite structure. For SrFe1−xCuxO3−δ series materials, the oxygen nonstoichiometry
and the oxygen permeation flux increased considerably with the increase of Cu-doping content (x = 0.1–0.3). The sintering property
of the membrane decreased significantly when the Cu substitution amount reached 40%. SrFe0.7Cu0.3O3−δ showed high oxygen permeation
flux, but SrCuO2 and Sr2Fe2O5 phases formed in the compound after oxygen permeation test induced cracks in the membrane.
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| 关 键 词： | 透氧性能 陶瓷膜 杂铜 制备 臭氧 非化学计量 工作温度范围 SrFeO3 |
| 收稿时间： | 5 October 2008 |
Preparation and oxygen permeation properties of SrFe(Cu)O3 dense ceramic membranes |
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| Authors: | Heng Zhang TingtingWang Xinfa Dong Weiming Lin |
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| Institution: | [1]School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China [2]School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China |
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| Abstract: | Mixed oxygen-ionic and electronic conducting membranes of SrFe(Cu)O3-δ were prepared by solid-state reaction method.The crystal structure,oxygen nonstoichiometry,and phase stability of the materials were studied by TGA and XRD.Oxygen permeation fluxes through these membranes were studied at operating temperature ranging from 750 to 950 ℃.Results showed that doping Cu in SrFeO3-δ compound had a significant effect on the formation of single-phased perovskite structure.For SrFe1-xCuxO3-δ series materials,the oxygen nonstoichiometry and the oxygen permeation flux increased considerably with the increase of Cu-doping content (x = 0.1-0.3).The sintering property of the membrane decreased significantly when the Cu substitution amount reached 40%.SrFe0.7CU0.3O3-δ showed high oxygen permeation flux,but SrCuO2 and Sr2Fe2O5 phases formed in the compound after oxygen permeation test induced cracks in the membrane. |
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| Keywords: | perovskite mixed conductor oxygen permeation phase stability |
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