Study on Influence Factors for Dispersed Property of Powder on Preparing Process of TiO_2 Nanometer Powder by Precipitation Method Xu Ying Chen Youzhi Li Zhihua Gong Jun Xu Ying Assoc. Prof.,School of Natural Sciences, WUT, Wuhan 430070, China.TiO 2 nanometer powder has been prepared by homogeneous precipitation method and lower temperature hydrolytic precipitation method using TiCl 4 derived. The influence factors for dispersed property of powder on preparation method, temperature, concentration, types of ammonium salts were investigated.TiO 2 nanometer powder; homogeneous precipitation method; lower temperature hydrolytic precipitation method; dispersed property Xu Ying: Assoc. Prof.,School of Natural Sciences, WUT, Wuhan 430070, China.