Preparation of ultrafine barium titanate powder by coprecipitation

被引:0
作者
Quan, XJ [1 ]
Li, DC
机构
[1] Chongqing Inst Technol, Dept Mat Sci & Engn, Chongqing 400050, Peoples R China
[2] Sichuan Univ, Dept Inorgan Mat, Chengdu 610065, Peoples R China
关键词
coprecipitation; barium titanate powders; synthesis;
D O I
暂无
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
This paper investigated the preparation of ultrafine barium titanate powders by using titanium tetrachloride and barium chloride as starting materials and NH4HCO3+(NH3H2O)-H-. as the precipitant. First of all, a thermodynamic analysis was made in detail to find out optimum synthesis conditions. Experiment results show that the Ba/Ti ratio of starting materials, calcination temperature, pH value of solution, have a close effect to the physical and chemical performances of the obtained powders. The best conditions are NH4HCO3/BaCl(2)(.)2H(2)O=1.2; TiCl4/BaCl2-2H(2)O=1 similar to1.01; reaction time=1h; calacination temperature=920 degreesC and calcination time 2h. The addition of some dispersants into the reactant system can obviously reduce particle sizes of the product.
引用
收藏
页码:853 / 860
页数:8
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