BaTiO_3微粉的溶胶凝胶制备与表征

PREPARATION BY SOL GEL METHOD AND CHARACTERIZATION OF BaTiO 3 POWDERS

采用溶胶凝胶工艺制备ＢａＴｉＯ３超微粉．利用ＸＲＤ技术研究了不同工艺条件下ＢａＴｉＯ３微粉的结晶结构．根据Ｓｃｈｅｒｒｅｒ原理计算了ＢａＴｉＯ３微晶的晶粒尺寸效应．研究了ＢａＴｉＯ３微粉的粒度随热处理温度的变化．

Ultrafine BaTiO 3 powders were prepared by sol gel methods. The crystalline structure of the powders prepared by different process was studied by XRD. Crystal size was calculated according to the Scherrer formula. The size effect on BaTiO 3 Curie phase transition was observed by DSC experiments. The relation between the grain size and firing temperature was analysed. The morphology of the powders was observed by SEM.