Preparation of monolithic silica glass by an ultra-fast sol-gel process

被引：0

作者：

Wang, C ^{[1
]}

Zhang, YH

Dong, L

Fu, LM

Bai, YB

Li, TJ

Liu, ZH

Wei, Y

机构：

[1] Jilin Univ, Dept Chem, Changchun 130023, Peoples R China

[2] Changchun Med Training Coll, Dept Pharmacol, Changchun 130031, Peoples R China

[3] Drexel Univ, Dept Chem, Philadelphia, PA 19104 USA

来源：

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 1999年 / 20卷 / 05期

关键词：

tetraethyl orthosilicate; sol-gel process; silica monoliths;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An ultra-fast sol-gel process has been developed to get high content silica materials, in which, the solvent tetrahydrofuran (THF) for hydrolysis of precursor tetraethyl orthosilicate, was removed through solvent extraction to obtain bulk sol. The bulk soi can be molded in different shapes such as discoid, pellet, octagon, cylinder, and half-sphere. They solidified and gelled in a very short time in the presence of lithium salt. Measurements show that the silica monoliths possess volume shrinkage of 52%, high silica content of 82.4% and transmittance of 70% in the UV/Vis region, and are crack-free indefinitely.

引用

页码：824 / 826

页数：3