Technology for preparing high-purity nanometer strontium titanate powder

A process for preparing high-purity strontium titanate nanoparticles as dielectric material includes such steps as preparing high-purity water, preparing the gel of n-titanic acid, adding strontium source to the gel to synthesize the suspension of strontium titanate, washing, regulating the mole ratio of Sr to Ti, and drying. Its advantages are low cost, easy control and high activity of product. 本发明涉及一种应用于高压电容器、晶界层电容器、压敏电阻、热敏电阻和其它电子元器件等的电介质材料水热钛酸锶的制备工艺。它包括：制备纯水，用制备的纯水配制化学计量式所要求的正钛酸凝胶，将经过计量的锶源加入到正钛酸凝胶中去合成钛酸锶悬浊液，洗涤制备的钛酸锶，调整锶、钛的元素摩尔比，干燥制备的钛酸锶，分级、包装。本发明的工艺同其它技术相比，原料便宜，工艺过程便宜控制，产品的具有晶粒发育完整、粒度小、且分布均匀，具有较高的活性。