Preparation of SiO2-Al2O3 Gels from Tetraethoxysilane and Aluminum Chloride A New Sol-Gel Method Using Propylene Oxide as a Gelation Promoter

Hidenobu ITOH; Takeshi TABATA; Mikako KOKITSU; Noriyasu OKAZAKI; Yuzo IMIZU; Akio TADA

doi:10.2109/jcersj.101.1081

Preparation of SiO₂-Al₂O₃ Gels from Tetraethoxysilane and Aluminum Chloride

A New Sol-Gel Method Using Propylene Oxide as a Gelation Promoter

Hidenobu ITOH, Takeshi TABATA, Mikako KOKITSU, Noriyasu OKAZAKI, Yuzo IMIZU, Akio TADA

Author information

Keywords: Sol-gel, SiO₂-Al₂O₃, Tetraethoxysilane, Aluminum chloride, Propylene oxide, Gelation promoter

JOURNAL FREE ACCESS

1993 Volume 101 Issue 1177 Pages 1081-1083

DOI https://doi.org/10.2109/jcersj.101.1081

Details

Abstract

A new method for preparing SiO₂-Al₂O₃ gels from aqueous solutions of tetraethoxysilane and aluminum chloride was investigated. Addition of propylene oxide to the solutions promoted gelation reaction, yielding translucent gels. It was found that the 4-coordinated Al incorporated in the framework of the gels was formed without heat treatment. Residual chloride ions were removed from the gels by heating. The gels obtained had large surface areas and were presumed to be homogeneous.

Corresponding author

Register with J-STAGE for free!