形貌可控钛酸锶钡的制备及其电场响应性能

Preparation and Electric Field Response Behavior of Barium Strontium Titanate with Different Controlled Shapes

采用低温共沉淀法,借助调控合成反应体系的pH值,制备了星形、花形和柱形3种不同形貌的钛酸锶钡(Ba0.85Sr0.15TiO3)粒子.通过XRD,ICP,SEM及CA分别对粒子的内部结构和表面进行了表征.结果表明,3种钛酸锶钡粒子均具有钙钛矿立方相结构,其粒径约为5～15μm.研究了3种形貌的钛酸锶钡粒子在含水复合弹性体介质中对电场作用的响应性能,发现粒子形貌对其在电场中的响应能力有很大影响.

Barium strontium titanate（ Ba0. 85Sr0. 15TiO3 ） with star, flower and drum-shapes were prepared under controllable different pH in the chemical co-precipitation systems at a low-temperature. The samples were characterized with XRD, SEM and CA. The results show that the length of Ba0.85Sr0.15TiO3 particle is in the range of 5-15 μm, and its crystal phase is cubic-perovskite structure. Three kinds of Ba0.85Sr0. 15TiO3 particles＇ electric field response performances were studied when they were in the gelatin aqueous elastomers under DC electric field or without field. It is found that the shape of barium strontium titanate plays an important role on its electric field response capability.