STUDY ON PREPARATION OF HIGH PURITY TiO₂ HYDROLYSIS OF TITANIUM ALKOXIDES

The synthesis method of titanium alkoxides has been introduced.In inert solvent,the process of preparation of TiO₂ particles by hydrolysis of self-made titanium alkoxides is described.The effects of the concentration of reactants,the temperature, amount of water,the stirring rate,dispersants,the drying and the burning on particle properties were studied.The TiO₂ powder has been prepared,whose purity is above 99.5 percent,particle size is below 1.0μm and form is similar to ball. This type of TiO₂ powder has been made into PTC electronic componments,with performance up to the technic indices of TDK produced in Japan.