SrCo0.8Fe0.1Sn0.1O3-δ管状透氧膜制备与分离性能表征  

Preparation of SrCo_(0.8)Fe_(0.1)Sn_(0.1)O_(3-δ) tubular membranes for oxygen separation

作　　者：樊传刚[1] 黄祥贤[1] 吴日铭[1] 郑翠红[1] 邓增强[2] 陈初升[2] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]中国科学技术大学材料科学与工程系,安徽合肥230026

出　　处：《功能材料》2008年第6期1037-1039,共3页Journal of Functional Materials

基　　金：国家自然科学基金重点资助项目(50332040)

摘　　要：用传统塑性挤出法制备SrCo0.8Fe0.1Sn0.1O3-δ(SSCF)致密管状透氧陶瓷膜,并表征了所制备样品的相组成和氧分离性能。研究发现固相反应法制备的SSCF陶瓷粉体,所经过的泥料及塑性成型过程(含去离子水),在1270℃烧成后不会对透氧膜的相组成(由均为立方钙钛矿相的主晶相和少量杂质相构成)产生影响。所获得的SSCF管状透氧膜样品(壁厚1.35mm),在PO2(h)=0.211×105Pa和PO2(l)=0.12×105Pa的较小氧分压梯度下,可以获得0.5×10-6mol/(cm2.s)的氧渗透率(STP);并且在940℃和固定吹扫氦气流量75ml/min的情况下,该样品能长时间保持1.2×10-6mol/(cm2.s)的氧渗透率。In this article, the preparation and characterization for dense SrCo0.8Fe0.1Sn0.1O3-δ （SSCF） tubular membrane were presented,and the later included the measurements of phase composition and oxygen permeation. The SSCF tubular membranes were prepared by traditionally plastic extrusion,and it was found that the deionized water in plastic paste did not change the feature of dual phase compositions of cubic perovskites for SSCF ceramics after the green compact fired at 1270℃. The as-prepared SSCF tubular membrane （with wall thickness of 1.35mm） had the promising permeation properties,i, e. a permeation rate of 0.5 × 10^-6mol/（cm^2 · s） at 900℃ only under a little oxygen partial pressure gradient of Po2 （h） = 0. 211 × 10^5 Pa/Po2 （l） = 0. 12 × 10^5 Pa, and an unchanged permeation flux of 1.2 × 10^-6mol/（cm^2 · s） at 940℃ during 160hrs operation by sweeping its inside with 75ml/min helium.

关 键 词：氧渗透 塑性挤出 管状透氧膜 立方钙钛矿相 

分 类 号：O643.13[理学—物理化学]