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四氯化钛水解法制备纳米氧化钛超细粉体

张青红; 高濂; 郭景坤   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:1999-02-05 修回日期:1999-03-23 出版日期:2000-02-20 网络出版日期:2000-02-20

Preparation of Nanosized TiO2 Powders from Hydrolysis of TiCl4

ZHANG Qing-Hong; GAO Lian; GUO Jing-Kun   

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Instituteof Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:1999-02-05 Revised:1999-03-23 Published:2000-02-20 Online:2000-02-20

摘要: 研究了改变溶液的酸碱度来控制TiCl水解,制备锐钛矿相超细TiO纳米粉体的过程.采用XRD、TEM、SAED和TG—DTA等方法对所得粉体进行了表征,发现水解后的沉淀经真空干燥后,不用任何热处理,室温下即有锐钛矿相存在,其原始粒径约为3.8nm,粉体于400℃煅烧2h,可得到平均粒径为7um的纯锐钛矿相纳米氧化钛粉体.

关键词: 氧化钛, 粉体制备, 水解, 纳米晶

Abstract: By controlling the hydrolysis of titanium tetrachloride with adding (NH4)2SO4 and NH4OH, the
preparation process of superfine titania powder was investigated. As-prepared powders were characterized by XRD,TEM, SAEDand TG-DTA techniques. Both XRD
and SAED results showed that anatase phase existed in the sample dried at room temperature under vacuum and its primary particle size was about 3.8nm.
When calcined at 400℃ for 2h, it was the single anatase phase of titania and its primary particle size increased to 6.8nm, but rutile phase occurred at the temperature over 700℃ for 2h.

Key words: titania, preparation of powder, hydrolysis

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