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Preparation of Nanosized TiO_2 Powders from Hydrolysis of TiCl_4

ZHANG Qing-Hong; GAO Lian;GUO Jing-Kun(State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Instituteof Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)  
By controlling the hydrolysis of titanium tetrachloride with adding (NH4)2SO4 andNH4OH, the preparation process of superfine titania powder was investigated. As-prepared powders were characterized by XRD,TEM, SAEDand TG-DTA techniques. Both XRD and SAEDresults showed that anatase phase existed in the sample dried at room temperature under vacuumand its primary particle size was about 3.sum. When calcined at 400'C for 2h, it was the singleanatase phase of titania and its primary particle size increased to 6.8um, but rutile phase occurredat the temperature over 700"C for 2h.
【Fund】: 上海市科委新材料研究中心!98JC14021
【CateGory Index】: TF123
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