钙钛矿型纳米钛酸铅的制备

以无水醋酸铅和钛酸丁酯为原料，采用溶胶-凝胶法制备了钙钛矿型纳米钛酸铅（PbTiO₃）粉体。利用X射线衍射(XRD)、粒度测试、扫描电镜(SEM)等分析测试手段，对制备的钛酸铅纳米粉体的结构、性质和形貌进行了表征，并讨论了影响溶胶-凝胶过程的诸因素。研究结果表明:无水乙醇、水解温度、丙三醇和热处理温度等因素均对溶胶-凝胶过程有明显的影响，其中反应温度对胶体形成时间的影响最明显。钙钛矿型钛酸铅晶体在450 ℃时形成，随着热处理温度的升高，粉体的物相组成也将发生变化。钛酸铅干凝胶在600 ℃热处理2 h后可以得到结晶程度很高、平均粒径为53.7 nm、颗粒大小分布均匀的纳米钛酸铅粉体。

Preparation of perovskite-type nano-sized lead titanate

By using anhydrous Pb(CH3COO)2 and Ti(OBu)4 as raw materials,nano-sized lead titanate(PbTiO3) powder was prepared by sol-gel process.Structure and characteristics,and morphology of nano-sized PbTiO3 powder were analyzed by means of XRD,grain test,and SEM etc..At the same time,different factors affecting the sol-gel process were discussed.Results showed that the factors,such as alcohol,hydrolysis temperature,C3H8O3,and heat treatment temperature had obvious influence on sol-gel process,especially,in which th...