SrCo0.8Fe0.2O3-δ管状非对称陶瓷膜的制备与氧渗透研究

无机材料学报, 2008, 23(6): 1221-1224. doi: 10.3724/SP.J.1077.2008.01221

SrCo_0.8Fe_0.2O_3-δ管状非对称陶瓷膜的制备与氧渗透研究

1.1. 安徽工业大学材料科学与工程学院, 马鞍山 243002

2. 2. 中国科学技术大学材料科学与工程系, 合肥 230026

1.1. School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, China

2. 2. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China

关键词：管状非对称陶瓷膜 , oxygen permeation , mixed ion and electron conducting , perovskite

Preparation and Oxygen Permeation for SrCo_0.8Fe_0.2O_3-δ Tubular Asymmetric Membrane

FAN Chuan-Gang , HUANG Xiang-Xian , LIU Wei , CHEN Chu-Sheng

Keywords： tubular asymmetric membrane , 氧分离 , 离子-电子混合导电 , 钙钛矿

用共烧法制备了以(SrCo_0.8Fe_0.2O_3-δ)_0.85(SrSnO₃)_0.15 (SCF-SS)多孔层为支撑体和SrCo_0.8Fe_0.2O_3-δ(SCF) 致密层为顶层膜的管状非对称透氧陶瓷膜; 并对其相组成、微形貌以及氧分离性能进行了表征. 研究发现: SCF和SCF-SS之间有较好的兼容性; 当共烧温度为1150℃时, 获得的非对称陶瓷膜的致密层厚度为50μm, 支撑体的显气孔率为19.3%; 900和800℃时, 非对称膜样品(壁厚1.4mm, 外径10.3mm, 长度为4.1cm)的氧渗透率分别为1.91和1.01mL·cm^-2·min^-1, 分别比同样几何尺寸的SCF对称膜样品高24%和36%.

The tubular asymmetric membrane (TAM) was prepared by co-firing method with dense top layer of SrCo_0.8Fe_0.2O_3-δ(SCF) and porous substrate layer of (SrCo_0.8Fe_0.2O_3-δ)_0.85(SrSnO₃)_0.15 (SCF-SS). Its phase composition, morphology and oxygen permeability were investigated. The results show that SCF layer and SCF-SS layer have desirable compatibility for configuration of asymmetric membrane. The resulting TAM sample sintered at 1150℃ has the dense layer of SCF with thickness of 50μm and the SCF-SS substrate with apparent porosity of 19.3%. The permeation rates of the resulting TAM are 1.91mL·cm^-2·min^-1 at 900℃ and 1.01mL·cm^-2·min^-1 at 800℃, respectively, which are 24% and 36% higher than those of the SCF tubular symmetric membrane (TSM) with same size(wall thickness of 1.4mm, outer diameter of 10.3mm, and length of 4.1cm).

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