Patent ID: 8863552
Filing Date: 2014-10-21
Classification: B82Y,C03B,C03C,C04B,Y10T

Abstract:
1. A process for producing a shaped body, comprising: a) providing fused silica in amorphous form having an SiO b) adding substantially alkali-free water to the fused silica grains to produce a slip without any stabilizers, with a ratio of fused silica grains to water being set so that the slip has a nonnewtonian and rheopexic flow behavior, c) casting the slip into a mould which comprises a hollow body having the inverse shape of the shaped body to be produced, d) drying the slip to give an intermediate body, e) sintering the intermediate body at a sintering temperature at which at least part of the fused silica is transformed from the amorphous modification into a crystalline modification, and f) cooling the sintered shaped body to a temperature below 300° C. so that a microstructure containing crystalline SiO