钙钛矿型混合导体BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ)的透氧性能  

Oxygen permeability of perovskite-type mixed ionic-electronic conductor BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ)

作　　者：汪承磊[1] 丁伟中[1] 张玉文[1] 周宇鼎[1] 黄少卿[1] 刘旭[1] 鲁雄刚[1] 

机构地区：[1]上海大学上海市现代冶金与材料制备重点实验室,上海200072

出　　处：《化工进展》2010年第2期304-307,337,共5页Chemical Industry and Engineering Progress

基　　金：国家高技术研究发展计划(国家863计划;2006AA11A89);上海市科委重点研究项目(07DZ12036;08DZ12064)

摘　　要：采用高温固相反应法制备钙钛矿型混合导体BaCo0.7Fe0.2Nb0.1O3-δ(BCFN)透氧膜,并通过SEM、XRD、O2-TPD等手段进行表征。实验考察了空气速率、氦气速率及温度对BCFN膜片透氧量的影响。研究发现膜的透氧量取决于两侧的氧分压差和氧离子在体相内的扩散。XRD的结果表明使用前后材料的相结构没有变化,证明BCFN作为透氧膜材料具有实际应用前景。Perovskite-type mixed conductor BaCo0.7Fe0.2Nb0.1O3-δ （BCFN） was synthesised through solid state reaction and charactered by SEM,XRD and O2-TPD. Influence of flow rate （Air or Helium） and temperature on the oxygen permeability of the BCFN membrane was investigated. It was found that the oxygen permeation is determined by the oxygen potential on both sides and body diffusion of the BCFN membrane. XRD results for both the freshly prepared and used membranes showed that the BCFN has phase stability and has perspect for practical application as oxygen permeation membrane.

关 键 词：BaCo0.7Fe0.2Nb0.1O3-δ 透氧膜 体扩散 表面过程 

分 类 号：TQ050.421[化学工程]