Hitachi Chemical Company, Ltd.

Hidekuni Banno

Nobuaki Takane

Youichi Machii

Kouichi Takei

Hiroki Terasaki

Yutaka Honda

Toshikatsu Shimazaki

A silica glass production process that can prevent cracks from occurring during the step of gel drying. In a process for producing silica glass, comprising the steps of subjecting a partial polycondensation product of alkoxysilane to hydrolysis in the presence of a solvent, an organic polymeric compound and a basic catalyst to form a sol, making the sol into a gel, drying the gel to form a dry gel, and firing the dry gel to obtain a glass, a salt is caused to exist in a concentration not less than 1.times.10.sup.-4 mol based on 100 g of the partial polycondensation product of alkoxysilane in the step of subjecting the partial polycondensation product of alkoxysilane to hydrolysis to form a sol.

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Tsukuba, Japan

Hidekuni Banno