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Citation: ZHENG Cui-Hong, LIU Wei, DENG Zeng-Qiang, YANG Ping-Hua, CHEN Chu-Sheng. Oxygen Permeabilities of SrSn_0.1Fe_0.1Co_0.8O_3-δ and Ba_0.1Sr_0.9Sn_0.1Fe_0.1Co_0.8O_3-δ Membranes[J]. Chinese Journal of Applied Chemistry, ;2003, 20(11): 1093-1095. shu

Oxygen Permeabilities of SrSn_0.1Fe_0.1Co_0.8O_3-δ and Ba_0.1Sr_0.9Sn_0.1Fe_0.1Co_0.8O_3-δ Membranes

1.
Department of Materials Science and Engineering, University of Science and Technology of China, Heifei 230026

Corresponding author: LIU Wei,
Received Date: 21 February 2003
Available Online: 23 May 2003
Fund Project: 国家自然科学基金资助课题(50225208) (50225208)

Oxygen-permeable membranes derived from SrFe_0.2Co_0.8O_3-δ were investigated aiming at improving the permeability and integrity. An oxygen flux as large as 1.52×10^-6 mol/(cm²·s) was observed for a 0.1 cm thick membrane of Ba_0.1Sr_0.9Sn_0.1Fe_0.1Co_0.8O_3-δ at 900℃ under a relatively small oxygen partial pressure gradient across the membrane(P'_O₂=2.13×10⁴ Pa, P"_O₂=9.12×10² Pa). The improved oxygen permeability may be attributed to the weaker association of oxygen vacancies as a consequence of partial substitution of Ba for Sr. The improved membrane stability of Sn-doped sample is likely due to the formation of SrSnO₃ second phase since the non-crystal Sr in grain boundaries is prior to reacting with Sn, which made the membrane more resistant to the corrosion from CO₂ and water vapor.
- dense ceramic membrane,
- oxygen permeation,
- conductivity
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Oxygen Permeabilities of SrSn0.1Fe0.1Co0.8O3-δ and Ba0.1Sr0.9Sn0.1Fe0.1Co0.8O3-δ Membranes

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通讯作者: 陈斌, bchen63@163.com

Oxygen Permeabilities of SrSn_0.1Fe_0.1Co_0.8O_3-δ and Ba_0.1Sr_0.9Sn_0.1Fe_0.1Co_0.8O_3-δ Membranes