The phase change of titania by processing condition of Ti(OH)₄-HCl-H₂O concentrated solutions

Abstract

TiO₂O powders were prepared by the hydrolysis of concentrated Ti(OH)₄-HCl-H₂O solutions changing with composition of solutions. Titania powders could be form easily on large quantity in a simple process at nearly room temperature. The synthesis rate of TiO₂ increased with decreasing H₂O. The specific surface area of produced powders increased with decreasing HCl. A highly sinterable powder composed of fine TiO₂ particles was obtained by hydrolysis of the solution at Cl^-Ti⁴⁺=10/10 in molar ratio. The relative density of the sintered body fired at 950°C for 2h was >95%.