PREPARATION AND CHARACTERIZATION OF SOL-GEL DERIVED MICROPOROUS MEMBRANES WITH HIGH THERMAL-STABILITY

被引：17

作者：

CHAI, MR

MACHIDA, M

EGUCHI, K

ARAI, H

机构：

[1] KYUSHU UNIV,GRAD SCH ENGN SCI,DEPT MAT SCI & TECHNOL,KASUGA,FUKUOKA 816,JAPAN

[2] MIYAZAKI UNIV,FAC ENGN,DEPT MAT SCI,MIYAZAKI 88921,JAPAN

来源：

JOURNAL OF MEMBRANE SCIENCE | 1994年 / 96卷 / 03期

关键词：

CERAMIC MEMBRANES; HEAT RESISTANCE; SOL-GEL METHOD; GAS SEPARATION; GAS PERMEABILITY;

D O I：

10.1016/0376-7388(94)00123-5

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Microporous ceramic membranes of Al2O3, BaO-Al2O3 and La2O3-Al2O3 were prepared by repeated dip-coating of a sol on an alpha-Al2O3 porous substrate. The thermal stability of the membranes was studied from their pore structure, gas permeability, gas separation factor and surface microstructure after calcination at 500-1300 degrees C. The BaO-Al2O3 and La2O3-Al2O3 membranes exhibited much higher heat resistance than the Al2O3 membrane. Although significant crack formation and pore growth were observed for the Al2O3 membrane after heating above 900 degrees C due to gamma-alpha transformation, the BaO-Al2O3 and La2O3-Al2O3 membranes retained a crack-free microstructure, narrow pore size distribution, and excellent selectivity for gas permeation even after calcination up to 1100 degrees C.

引用

页码：205 / 212

页数：8

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