Synthesis and Property of SrFeCo0.5O 3.25+δ Ultrafine Powders and Oxygen Permeation Membranes

Abstract

Abstract: SrFeCo_0.5O_3.25+δ (SFC) ultrafine powders with appropriate dispersibility and sintering properties were synthesized by glycine-nitrate-process (GNP) method and used for the preparation of oxygen permeation membrane. Compared with those of SFCmembranes synthesized by conventional solid-state reaction method, the phase structure, microstructure, conductivity and oxygen permeation properties of the SrFeCo_0.5O_3.25+δ ceramic membrane material were studied. The results revealed that the SrFeCo_0.5O_3.25+δ system mainly consisted of perovskite and layered phases. Its oxygen permeation flux is about 1.2×10^-8mol·cm^-2 ·s^-1 in air/helium gradient at 950 ℃, which is higher than that of sample prepared by solid state reaction method.

Key words: Oxygen permeation membrane, Glycine-nitrate-process, Conductivity

CLC Number:

O617

TrendMD:

LIU Wei, CHENG Kai, ZHANG Guo-Guang, CHEN Chu-Sheng, LIU Xing-Qin, PENG Ding-Kun . Synthesis and Property of SrFeCo_0.5O_3.25+δ Ultrafine Powders and Oxygen Permeation Membranes[J]. Chem. J. Chinese Universities, 2000, 21(9): 1335.

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Synthesis and Property of SrFeCo_0.5O_3.25+δ Ultrafine Powders and Oxygen Permeation Membranes

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