溶胶-凝胶法合成钛酸钡超细粉体工艺研究

Synthesis of BaTiO_3 powders by Sol-gel

以钛酸丁酯和醋酸钡为原料 ,采用溶胶 凝胶法工艺可制得粒径 2 0～ 2 0 0nm、颗粒外貌近似球形的钛酸钡超细粉体 .其最佳工艺条件为 :水解用水量 85ml,混合溶液pH =3 .5 ,凝胶化温度 93～ 95℃ ,室温真空干燥及在 70 0～ 90 0℃温度下进行高温煅烧处理 .

Describes a Sol gel process for BaTiO 3 ultrafine powders with spnerical particals of 20～200 nm in diameter prepared by Sol gel using C 4H 9O) 4Ti and Ba(CH 3COO) 2 and presents optimum parameters, such as water volume in hydrolysis of 85 ml, pH=3.5, gel temperature 93～95 ℃, vaccume dry at 25 ℃ and calcination at 700～900 ℃.