Preparation of SrFe0.6Cu0.3Ti0.1O3-δ Mixed Oxygen-Ionic and Electronic Conductor
SrFe0.6Cu0.3Ti0.1O3-δ(SFCTO) composite-oxide powder was synthesized by citric acid complex method and studied as mixed oxygen-ionic and electronic conducting membrane material.The formation process of the perovskite-type compound was detected by XRD,infra-red spectrum and thermo gravimetric analysis; the effects of ethylene glycol added in the sol formation process on the size distribution of the powder and the oxygen permeation flux of the membrane were examined.A stable sol was formed when the molar ratio of total metal ions to citric acid and ethylene glycol was 1∶2∶3 and the pH value was 5.5; the characteristic absorption peaks of citric acid in the dried gel,O-H and-COO-,moved toward low frequency direction for 200 cm-1 and 135 cm-1 respectively due to the complexing action of the metal ions and citric acid.As the dried gel was heated in air up to 400℃,SrCO3 phase appeared by the combustion of citric acid and ethylene glycol.The perovskite phase started to form at 700 ℃,SrCO3 phase reduced gradually and the single phase of SFCTO was obtained at 900 ℃.The SFCTO dense membrane prepared under the optimum conditions exhibited an oxygen permeation flux of 0.7 ml·min-1cm-2 at 900℃.
Oxygen permeation Mixed conductor Citric acid
Zhang Heng Dong Xinfa Lin Weiming
College of Chemistry Science,Qufu Normal University,Qufu 273165,China School of Chemical and Energy Engineering,South China University of Technology,Guangzhou 510640,Chin
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
259-262
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）