Al2O3-SiO2-TiO2 composite ceramic membranes from sol-gel processing

被引：10

作者：

Zeng, ZQ ^{[1
]}

Xiao, XY ^{[1
]}

Gui, ZL ^{[1
]}

Li, LT ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

MATERIALS LETTERS | 1998年 / 35卷 / 1-2期

关键词：

membranes; composite; sol-gel;

D O I：

10.1016/S0167-577X(97)00219-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Al2O3-SiO2-Ti-2, composite ceramic membranes were prepared using sol-gel processing. The effects of the composition on sol stability, membrane microstructure and surface morphology are discussed. The results showed that the Ti content decreased the gelation time while the effects of Al and Si were not distinct. Large amounts of Ti led to cluster formation in the membranes and the porous structure is destroyed by excessive Si. The presence of Al is helpful to prepare composite membranes with uniform particles and pores. Significantly different morphologies were observed for membranes with different compositions. The mon Si the membrane had, the rougher the surface was. On the other hand, the existence of Ti smooths the surface. This study indicates that the composite ceramic membranes have a great potential for surface modification. (C) 1998 Elsevier Science B.V.

引用

页码：67 / 71

页数：5