Abstract: Titanium tetrachloride reacted with triethanolamine to form soluble titanium compound. The compound was aged at 145 ℃ for 48 h forming monodispersed titanium dioxide particles. The formation and hydrolysis of the compound were discussed. Change of the pH value of the aging solution between 0.9 and 10.5 great influences the particle size and shape, the higher the acidity, the less the particles size. Rod particles are formed at pH 10.5 and spherelike particles are formed at the pH less than 10.0. The particle size can also be controlled by adding seeds. In the case of adding seeds at pH 10.5, the shape of the particles keeps rod. Crystal habits of the particles were detected by TEM and XRD etc.

Key words: Titanium tetrachloride, Titanium dioxide, Superfine particles, Size control, Seed