立方体形貌的BaTiO3纳米粒子的融盐法制备与表征  

Preparation and characterization of BaTiO_3 nanoparticles with cubic morphology by molten salt method

作　　者：朱启安[1] 张超[1] 龚敏[1] 雍高兵[1] 项尚[1] 

机构地区：[1]湘潭大学化学学院,环境友好化学与应用省部共建教育部重点实验室,湖南湘潭411105

出　　处：《功能材料》2009年第9期1555-1558,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50472080);湖南省教育厅科学研究资助项目(06C829)

摘　　要：用TiO2和Ba(OH)2为钛源和钡源,以NaOH和KOH为熔剂,采用融盐法成功地合成了Ba-TiO3纳米粒子。用XRD、SEM、TEM、ED、EDS和FT-IR对产品的结构、形貌和成份进行了表征。结果表明,在反应温度为200℃、反应时间为24h时能得到形状为立方体、大小分布均匀、粒径约为20～55nm的钛酸钡纳米粒子;随反应时间增加,粒子形貌由立方体逐渐变为球形,且粒径增大。所得产品为立方晶相、结晶良好、纯度高的BaTiO3纳米粒子。另外,还初步探讨了融盐法制备BaTiO3纳米粒子的形成机理。BaTiO3 nanoparticles with cubic morphology starting from Ba（OH）2 and TiO2 have been successfully synthesized by molten salt method using NaOH and KOH as a flux. TEM, XRD, ED, SEM, EDS and FT-IR techniques were used to characterize the structure, morphology and composition of the products. Results show that when reaction temperature is 200℃ and reaction time is 24h, the cube-shaped BaTiO3 nanoparticles, with uniform size distribution and the particle size of 20-55nm, can be obtained. The morphology of the nanoparticles gradually changes into spherical shape from cube and its diameters increase with increasing of the reaction time. The obtained BaTiO3 nanopartieles are cubic phase with high crystallinity and high purity. In addition, the formation mechanism of BaTiO3 nanoparticles prepared by molten salt method was also discussed.

关 键 词：钛酸钡 纳米粒子 电子陶瓷材料 介电材料:融盐法 

分 类 号：O614.23[理学—无机化学]