采用喷雾水解反应法得到粒径在0.5～2μm之间球形实心、单个粉体内钡钛比也完全均匀的钛酸钡粉体.实验结果表明,水解反应和沉淀反应段的温度及长度、和草酸二甲酯的浓度是影响产物保持球形和组份是否均匀的主要因素.采用喷雾水解反应法获得理想钛酸钡超细粉体的工艺条件为:反应段温度>85℃,反应段停留时间>3s;DMO浓度>0.75mol/L.
The spherical, solid BaTiO3 powders with 0.5～2μm and uniform composition were prepared by the spray hydrolysis reaction method. The main factors on the preparation of solid and uniform composition powders are reaction temperature and time, and the concentration of dimethyl oxalate (DMO), which is the inter-precipitator. The optimum conditions for the preparation of ideal powders are that the reaction temperature is more than 85℃, and the time is more than 3s, and the concentration of DMO is more than 0.75 mol/L.
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