PREPARATION OF SIO2-AL2O3 GELS FROM TETRAETHOXYSILANE AND ALUMINUM-CHLORIDE - A NEW SOL-GEL METHOD USING PROPYLENE-OXIDE AS A GELATION PROMOTER

Authors
ITOH H TABATA T KOKITSU M OKAZAKI N IMIZU Y TADA A
Citation
H. Itoh et al., PREPARATION OF SIO2-AL2O3 GELS FROM TETRAETHOXYSILANE AND ALUMINUM-CHLORIDE - A NEW SOL-GEL METHOD USING PROPYLENE-OXIDE AS A GELATION PROMOTER, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 101(9), 1993, pp. 1081-1083
Citations number
3
Categorie Soggetti
Material Science, Ceramics
Journal title
Nippon Seramikkusu Kyokai gakujutsu ronbunshi → ACNP
ISSN journal
09145400
Volume
101
Issue
9
Year of publication
1993
Pages
1081 - 1083
Database
ISI
SICI code
0914-5400(1993)101:9<1081:POSGFT>2.0.ZU;2-R
Abstract
A new method for preparing SiO2-Al2O3 gels from aqueous solutions of t etraethoxysilane and aluminum chloride was investigated. Addition of p ropylene oxide to the solutions promoted gelation reaction, yielding t ranslucent gels. It was found that the 4-coordinated Al incorporated i n the framework of the gels was formed without heat treatment. Residua l chloride ions were removed from the gels by heating. The gels obtain ed had large surface areas and were presumed to be homogeneous.