无机材料学报

• 研究论文 • 上一篇    下一篇

多孔La0.6Sr0.4Co0.2Fe0.8O3-δ的制备及表征

刘卫1,2; 章占平1,2; 夏长荣2; 谢津桥1,2; 陈初升1,2   

  1. 1. 中国科技大学内耗与固体缺陷开放实验室; 2. 中国科技大学材料科学与工程系, 合肥 230026
  • 收稿日期:1999-11-05 修回日期:1999-12-06 出版日期:2000-10-20 网络出版日期:2000-10-20

Preparation and Characterization of Porous La0.6Sr0.4Co0.2Fe0.8O3-δ Ceramics

LIU Wei1,2; ZHANG Zhan-Ping1,2; XIA Chang-Rong2; XIE Jin-Qiao1,2; CHEN Chu-Sheng 1,2   

  1. 1.Laboratory of Internal Friction and Defects; 2.Department of Materials Science and Engineering; University of Science and Technology of China; Hefei 230026; China
  • Received:1999-11-05 Revised:1999-12-06 Published:2000-10-20 Online:2000-10-20

摘要: 多孔La0.6Sr0.4Co0.2Fe0.83-δ陶瓷具有一定的强度、良好的透气和电传导性能,可用于中温 SOFC阴极支撑体和氧分离膜活性支撑体.本文用固相反应法制备了多孔La0.6Sr0.4Co0.2Fe0.83-δ陶瓷.考察了烧结条件、成型压力和有机添加剂量对孔隙率和孔径的影响.研究发现气体渗透率随孔隙率线性增长,电导率随孔隙率的增大而下降,并满足关系式σ=σ(1— 3.1

关键词: 多孔陶瓷, 混合导体, 透氧膜, 燃料电池

Abstract: Mixed ionic electronic conductor La0.6Sr0.4Co0.2Fe0.8O3-δ in the porous form can be used as cathodes for solid oxide fuel cells and
supports for thin oxygen separation membranes. La0.6Sr0.4Co0.2Fe0.8O3-δ porous ceramics were prepared by solid state reaction. The porosity and
pore size were investigated as a function of sintering temperature, molding pressure and amount of organic additive. The experimental results show
that with increasing porosity, its nitrogen permeability increases, but its electrical conductivity decreases as described by σ=σ0·(1-P)3.1.

Key words: porous ceramics, mixed conductor, oxygen permeation membrane, SOFC

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