摘要
以四氯化钛和氯化钡为钛源和钡源,以NaOH溶液为沉淀剂,首次采用超重力反应沉淀法(HGRP)制备了纳米BaTiO3粉体。产品经TEM、激光粒度仪、BET、XRD、AES-ICP及化学分析法分析表明:钛酸钡一次粒子粒度约为50～70nm,颗粒为球形;二次粒子平均粒度为152nm,粒度分布窄;晶型为立方相;粉体Ba/Ti摩尔比为1.000±0.005,纯度较高。粉体烧结成瓷后介电性能优于常规搅拌釜式反应器制得粉体烧成陶瓷样品的介电性能。
Nanosized BaTiO3 powders were prepared by HGRP from TiCl4 and BaCl2 solutions, and in this process NaOH solution acted as a precipitant. Powders obtained were studied by TEM, Laser particle size distribution (PSD) analyzer, BET, XRD, AESICP and chemical analysis. The results showed that the particles were spherical and the original particle size of them was about 50~70nm. The agglomeration of BaTiO3 powders had an average particle size of 152nm with a narrow PSD. The crystal structure was cubic perovskite. The powder also had a Ba/Ti molar ratio of 1.000±0.005 and was of high purity. Dielectric properties of ceramics sintered from it were excellent and were obviously better than that of ceramics sintered from powder prepared in conventional stirring reactors.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2003年第1期50-55,共6页
Chemical Reaction Engineering and Technology
基金
国家863计划资助项目(2001AA325010)
北京市科技新星计划项目(9558103500)
教育部科学技术研究重大项目基金(重大0202)
霍英东教育基金。
