摘要
以八水合氢氧化钡、钛酸四丁酯为原料,采用水热球磨去羟基法制备四方相钛酸钡(BaTiO_3)粉体,研究原料钡钛摩尔比(Ba/Ti)、反应时间、反应温度等因素对四方相BaTiO_3合成的影响,通过XRD、TEM、SEM等测试手段,分析了BaTiO_3的晶相组成、颗粒形貌及其陶瓷介电性能。研究表明,当Ba/Ti比值2.0、反应时间120 h、丁醇与水体积比1:1、反应温度180℃条件下,获得了高纯四方相BaTiO_3粉体,其晶形规整,粉末粒度小,颗粒均匀,分散性良好,用其烧结的陶瓷常温下相对介电常数高达1793,击穿场强达到3.1 kV/mm。
Preparation of tetragonal phase barium titanate (BaTiO3) powder was carried out by hydrothermal ball milling dehydroxyl method, using barium hydroxide octahydrate and tetrabutyl titanate as raw materials. The e ffects of molar ratio of raw materials, reaction time and reaction temperature on the synthesis of tetragonal BaTiO3 were studied. Crystal phase structure, particle morphology and ceramic electrical properties of BaTiO3 were analyzed by XRD, TEM and SEM. Studies have shown that when the Ba/Ti ratio is 2 : 1, reaction time is 120 h, butanol to water volume ratio is 1 : 1, and the reaction temperature is 180℃, high-purity tetragonal barium titanate powder with regular crystal form can be obtained. The resulting powder has small particle size, uniform particle size distribution and good dispersibility. The relative dielectric constant of BaTiO3 ceramic at room temperature is as high as 1,793, and the breakdown field strength is 3.1 kV/mm.
作者
时卓
刘坤
肖飞
孙连来
张莹莹
姜伟
SHI Zhuo;LIU Kun;XIAO Fei;SUN Lianlai;ZHANG Yingying;JIANG Wei(School of Material Science and Engineering, Shenyang University of Technology, Shenyang 110870, Liaoning, China;Liaoning Research Institute of Light Industry, Shenyang 110036, Liaoning, China)
出处
《陶瓷学报》
CAS
北大核心
2019年第2期234-238,共5页
Journal of Ceramics
关键词
钛酸钡
水热球磨
四方相
介电性能
barium titanate
hydrothermal ball milling
tetragonal phase
dielectric properties
