TITANIUM DIOXIDE POWDER AND METHOD FOR PRODUCTION THEREOF

摘要

A titanium dioxide powder which has a rutile content of 80 % or more and a BET surface area of 30 m<2>/g or more; and a method for producing the titanium dioxide powder wherein a titanium tetrachloride gas, an oxygen gas, a hydrogen gas and steam are reacted in a gas phase, which comprises supplying the above steam in an amount of a chemical equivalent necessary for oxidizing the whole of the titanium tetrachloride gas or more. The above titanium dioxide powder is suitably used as a coating material for a glass substrate and a filler. The above method can be employed for arbitrarily producing a titanium dioxide powder which is composed of fine particles having a great specific surface area and also has a very high rutile content or an anatase type titanium dioxide powder having a high specific surface area.