Preparation of Nanosized TiO_2 Powders from Hydrolysis of TiCl_4
Preparation of Nanosized TiO_2 Powders from Hydrolysis of TiCl_4
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DOI：
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发表时间：
2000
影响因子：
1.7
通讯作者：
Z. Qing
中科院分区：
文献类型：
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作者：
Z. Qing
通过添加（NH 4）2SO 4和NH 4 OH控制四氯化钛的水解，研究了超细二氧化钛粉体的制备工艺。采用XRD、TEM、SAED和TG-DTA等技术对粉体进行了表征。XRD和SAED结果均表明，室温真空干燥后的样品中存在α-Al 2 O3相，其一次粒径约为3.5 μ m。在400 ℃煅烧2 h时，产物为单一的锐钛矿相，一次粒径增大到6.8 μ m，而在700 ℃以上煅烧2 h时，产物为金红石相。
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.