摘要
以Ba(OH)2.8H2O和ZrOCl2.8H2O为原料,首先将ZrOCl2.8H2O水解制备高活性ZrO2.H2O(H2ZrO3),再与Ba(OH)2.8H2O按1∶1(物质的量比)均匀混合研磨1h后,在100℃烘干反应15h,得到了立方相锆酸钡纳米晶.TEM形貌观察,粒子为均匀方形,并且分散均匀,粒径为40～80nm.通过对不同反应温度和反应时间所制备样品的XRD图谱分析,确定出了化学反应为该低温固态反应速度控制步骤的反应机理.
Nano-BaZrO3 ceramics were synthesized by solid-state reaction at low temperature by using ZrOCl2·8H2O and Ba（OH）2·8H2O as raw materials.During the synthesis process,high-activity ZrO2·H2O（H2ZrO3） was prepared by the hydrolysis of ZrOCl2·8H2O.Then,the mixture of TiO2·H2O and Ba（OH）2·8H2O with the molar ratio of 1∶1 was ground at room temperature for 1 h and dried at 100 ℃ for 15 h.XRD analysis showed that the product was cubic pahse of BaZrO3.TEM photograph indicated that the well-dispersed particles exhibited uniform square shape with average size of 40~80 nm in diameter.On the basis of the XRD analysis of the products synthesized at different reaction temperature and time,it is concluded that the chemical reaction is the rate-determining step of the low temperature solid state reaction.
出处
《河北大学学报（自然科学版）》
CAS
北大核心
2012年第1期63-67,共5页
Journal of Hebei University(Natural Science Edition)
基金
河北省自然科学基金重点资助项目(B2008000574)
关键词
低温固态反应
纳米锆酸钡
制备过程
反应机理
solid-state reaction
nano-barium zirconate
preparation
reaction mechanism
