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Preparation of Ultra-fine Barium Titanate Powder by Coprecipitation Method Using TiCl_4

Guo Jing,Hu Ribo,Xiong Yufei,Zhou Dali(Department of Inorganic Non-metallic Materials,Sichuan University,Chengdu,Sichuan,610065,China)  
This paper investigated a new preparation process of BaTiO_3 ultra-fine powder used in electronic ceramics.Firstly,preparating a mixing solution of TiCl_4 and BaCl_2.Secondly,the mixing surfactants synthesized by authors were added into the solution,Thirdly,NH_4HCO_3 and NH_3·H_2O were directly added into the solution and got the precursor of barium titanate.Finally,the BaTiO_3 ultra-fine powders were got by drying and calcining the precursor for 1.5 h at 1020℃.The influence of some technological parameters,such as ratio of materials,concentration of TiCl_4,amount of surfactants,loading manner of materials,reaction temperature and calcination temperature on the physical and chemical characteristics of the barium titanate were emphatically discussed.
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