高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (9): 1335.

• 论文 •    下一篇

SrFeCo0.5O3.25+δ粉体的合成和透氧膜的制备及其性能研究

刘卫, 成凯, 张国光, 陈初升, 刘杏芹, 彭定坤   

  1. 中国科学技术大学材料科学与工程系内耗与缺陷实验室, 合肥 230026
  • 收稿日期:1999-11-01 出版日期:2000-09-24 发布日期:2000-09-24
  • 通讯作者: 刘　卫(1956年出生),男,博士,副研究员,从事固体缺陷和无机透氧膜研究.
  • 基金资助:

    国家自然科学基金(批准号:59789201)资助

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

LIU Wei, CHENG Kai, ZHANG Guo-Guang, CHEN Chu-Sheng, LIU Xing-Qin, PENG Ding-Kun   

  1. Department of Materials Scienceand Technology, Laboratoryof Internal Frictionand Defect, Universityof Scienceand Technologyof China, Hefei 230026, China
  • Received:1999-11-01 Online:2000-09-24 Published:2000-09-24

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摘要： 采用甘氨酸-硝酸盐法合成Sr-Co-Fe复合氧化物超细粉体,用以制备组成为SrFeCo0.5O3.25+δ(SFC)致密透氧陶瓷膜.结果表明粉体分散性和烧结性能好,残碳量可忽略,组成符合给定的化学计量比.对SrFeCo0.5O3.25+δδ陶瓷膜材料进行了相结构、微结构、电导和氧渗透性能的研究,所获得的SFC透氧膜材料有较高的氧渗透率,并与传统的固相反应法制得的样品进行了比较.

关键词: 透氧膜, 甘氨酸-硝酸盐法, 电导率

Abstract: SrFeCo0.5O 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 SrFeCo0.5O 3.25+δ ceramic membrane material were studied. The results revealed that the SrFeCo0.5O 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

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