摘要
以偏钛酸为钛元素的来源,与草酸反应生成钛的草酸络合物,然后与氯化钡进行化学共沉淀反应.制备出钛酸钡粉体。沉淀反应过程的 pH 值对钡钛摩尔比起着关键的作用。热分解的温度控制在950℃并保温3.5h 对样品的粒度和晶型有利。在该工艺条件下制备的样品平均粒度为0.37μm、粒度分布均匀,形貌为球形,钡钛比达到0.999,具有四方相的晶体结构、主含量为99.81%,杂质含量符合行业标准要求。
Barium titanate powder was fabricated by the way of chemical coprecipitation, in which β-TiO- （OH）2 was used as the resource of element titanium and, first of all, T^i4＋ was made in [TiO（C204）2]^2- and then coprecipitated with BaCl2. During the process of coprecipitation, the pH value was an important factor for the mole rate of Ba/Ti. It＇s useful for size and crystallization of barium titanate particles to calcine BaTiO（C24）2 ·4H2O at the 950℃ for 3.5h. Barium titanate powder prepared by the method was suitable for the standard of the electron industry. The main data of test are.. the mean particle size is 0. 37μm, morphology is global, the mole rate of Ba/Ti is 0. 999, the crystal is tetragonal, the ingredient of BaTiO3 is 99. 81%, the content of impurity was less than the index of the electron industry standard.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2005年第11期133-135,共3页
Materials Reports
基金
四川省应用科学基金项目(02GY029-008)
