2 METHOD FOR THE PRODUCTION OF OPAQUE QUARTZ GLASS SIO2 GRANULATE SUITABLE FOR USE IN PERFORMING THE METHOD AND A COMPONENT MADE OF OPAQUE QUARTZ GLASS

摘要

The present invention relates to a synthetic SiO₂And forming a blank body made of opaque quartz glass by heating it at a predetermined vitrification temperature. The present invention also relates to a method for producing opaque quartz glass. On the basis thereof, in order to provide a homogeneous pore distribution, and simultaneously a process for producing pure opaque quartz glass having a high density, a high viscosity and a low slipping tendency,₂As the granules, at least partially porous SiO₂(SiO2) particles having a specific surface area (according to BET) of 1.5 m 2 / g to 40 m 2 / g and an apparent density of 0.8 g / cm 3 or more formed from agglomerates of primary particles₂It is proposed to use granular material 21 (31). Suitable SiOs for carrying out the process₂The granular material (21; 31) comprises an at least partially porous SiO₂Is formed from aggregates of primary particles and is characterized by having a specific surface area (according to BET) of 1.5 m 2 / g to 40 m 2 / g and an apparent density of 0.6 g / cm 3 or more.