Dispersion comprising a powder of a silicon and titanium mixed oxide, green bodies and shaped glass articles produced therefrom

摘要

Dispersions contain a silicon-titanium mixed oxide powder obtained by flame hydrolysis and of BET surface area 5-500m2/g and titanium dioxide content 0.5-20 wt.% together with water and a pH-regulator which can be completely removed from the reaction mixture on heating, the solids content in terms of the powder being 40-80 wt.%. Independent claims are also included for: (1) production of the dispersions by dispersing the powder with a dispersing device in water containing an appropriate pH-regulator; (2) dispersion-based green bodies and optical-quality glass obtained from such bodies; and (3) production of the green bodies and glass.