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

来源：

JOURNAL OF INORGANIC MATERIALS | 2001年 / 16卷 / 05期

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

页码：853 / 860

页数：8