无机材料学报

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SrCo0.8Fe0.2O3-δ及SrCo0.8Fe0.1Sn0.1O3-δ的热学性能与透氧性能研究

樊传刚1,2, 刘卫1, 左艳波1, 邓增强1, 黄祥贤2, 陈初升1   

  1. 1. 中国科学技术大学材料科学与工程系, 合肥 230006; 2. 安徽工业大学材料工程学院, 马鞍山 243002
  • 收稿日期:2005-09-20 修回日期:2005-11-16 出版日期:2006-09-20 网络出版日期:2006-09-20

Thermal Stability and Oxygen Separation Properties of
SrCo0.8Fe0.2O3-δand SrCo0.8Fe0.1Sn0.1O3-δCeramic Membranes

FAN Chuan-Gang1,2, LIU Wei1, ZUO Yan-Bo1, DENG Zeng-Qiang1, HUANG Xiang-Xian2, CHEN Chu-Sheng1   

  1. 1. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230006, China; 2. School of Materials Engineering, Anhui University of Technology, Maanshan 243002, China
  • Received:2005-09-20 Revised:2005-11-16 Published:2006-09-20 Online:2006-09-20

摘要: 介绍了对SrCo0.8Fe0.2O3-δ及SrCo0.8Fe0.1Sn0.1O3-δ两种透氧膜材料相组成、热学性能及氧渗透性能的研究, 发现实验中获得的SrCo0.8Fe0.2O3-δ透氧膜材料具有长期的相组成稳定性; 在它的B位进一步用Sn取代Fe,获得名义组成SrCo0.8Fe0.1Sn0.1O3-δ样品, 具有典型的双相组成特征. 与单相SrCo0.8Fe0.2O3-δ相比, 双相结构SrCo0.8Fe0.1Sn0.1O3-δ样品的热膨胀率降低, 抗热冲击性能增加显著; 同时, 氧渗透性能也有一定程度的提高, 如1.2mm厚的SrCo0.8Fe0.2O3-δ陶瓷膜样品在1000℃具有1.87×10-6mol cm-2 s-1的透氧率(PO2(h)=2.09×104Pa, PO2(l)=1.2×103Pa), 同样条件下的SrCo0.8Fe0.1Sn0.1O3-δ样品透氧率为2.49×10-6 mol cm-2 s-1.

关键词: 氧渗透, 钙钛矿结构, 陶瓷膜, 抗热冲击性能

Abstract: The phase composition, thermal shocking resistance and the separating properties
of both SrCo0.8Fe0.2O3-δ(SCF) and SrCo0.8Fe0.1Sn0.1O3-δ (SSCF) membranes were investigated systematically. It was found the as
prepared SCF had long-term phase stability, and the SSCF had the composite feature with dual phase composition. As compared with the SCF, the SSCF had a more promoted thermal shocking resistance, which related to the decreasing of thermal expansion coefficient of it in comparison with the former. Furthermore, a permeation rate of 1.87×10-6 mol cm-2 s-1 was obtained on the as-prepared SCF membrane at 1000℃ and under oxygen partial pressure gradient of the PO2(h)/PO2(l)=0.209atm /0.012atm,
and at the same measuring condition, the permeability was 2.49×10-6 mol cm-2 s-1 for the as prepared SSCF one.

Key words: oxygen permeation, perovskite structure, ceramic membrane, thermal shocking resistance