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采用超声化学法方便地制得了Sr1-xPbxTiO3(SPT)纳米粉末。高强度的超声作用促使了SPT纳米颗粒的快速形成。通过控制Sr2+和Pb2+的摩尔比,可以得到不同形貌的SPT纳米粉末:当x=0,可以得到球形的纳米粉末;随着Pb2+含量的增加,SPT纳米粉末的形状由球形变成方形。通过X射线衍射仪对SPT纳米粉末进行表征。结果表明:在固定的起始反应物总浓度下,随着Pb2+含量的增加,所得到纳米粉末的微结构也随之变化。超声化学法合成SPT纳米粉的反应分两个过程进行:首先TiCl4水解形成富钛凝胶;然后在超声影响下,溶液中的Sr2+和Pb2+扩散到钛凝胶表面,并以其为核生成SPT纳米颗粒。
Sr1-xPbxTiO3 (SPT) nanopowder was prepared by sonochemical method. High-intensity ultrasound stimulated the rapid formation of SPT nanoparticles. By controlling the molar ratio of Sr2 + and Pb2 +, the morphology of SPT nanosized powders can be obtained. When x = 0, spherical nanosized powders can be obtained. With the increase of Pb2 + content, the shape of SPT nanosized powders changed from spherical to square. The SPT nanopowder was characterized by X-ray diffractometer. The results show that with the increase of Pb2 + concentration, the microstructure of the obtained nano-powders also changes with the total concentration of starting reactants fixed. The reaction of SPT nanopowder by sonochemical method is divided into two processes: firstly, TiCl4 is hydrolyzed to form titanium-rich gel; then under the influence of ultrasound, Sr2 + and Pb2 + in solution diffuse to the surface of titanium gel and generate SPT Nanoparticles.