Silica glass formation process

Glass manufacturing – Processes – With shaping of particulate material and subsequent fusing...

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65 183, 65901, 501 12, C03B 1906

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048013188

ABSTRACT:
In a forming a silica glass at low temperature, a fumed silica is added to a hydrolyzed solution of a metal alcoxide. 0.2-5 mol of fumed silica is added to 1 mol of metal alcoxide. Being uniformly dispersed, the solution is gelled and dried to be dry gel and then sintered to be non-porous. This process allows a practically large sized silica glass to be materialized which has been impossible by the previous sol-gel technology. In addition, a further large silica glass can be prepared by adjusting pH value to 3-6 with addition of base in the sol solution.

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