FLAMMENHYDROLYTISCH HERGESTELLTES SILICIUM-TITAN- MISCHOXIDPULVER

摘要

Flame hydrolytically-produced silicon-titanium mixed oxide powders consisting of aggregates of primary particles are such that (A) the primary particles are predominantly of Si-Ti mixed oxide; and (B) the powder has a BET surface area 20-200 m 2>/g, a TiO 2fraction of 10-70 wt.% and a rutile/anatase X-ray diffraction diagram of rutile/anatase ratio 2 : 98-2 : 98. Flame hydrolytically-produced silicon-titanium mixed oxide powders consisting of aggregates of primary particles are such that: (A) the primary particles are of amorphous silicon dioxide, crystalline titanium dioxide or silicon-titanium mixed oxide with an amorphous SiO 2and crystalline TiO 2fraction so that Si-Ti mixed oxide primary particles predominate; and (B) the powder has a BET surface area 20-200 m 2>/g, a TiO 2fraction of 10-70 wt.% and a rutile/anatase X-ray diffraction diagram of rutile/anatase ratio 2 : 98-2 : 98. An independent claim is also included for preparation of the powders.