采用有机碱矿化剂制备钙钛矿型CaTiO_3纳米粒子的研究  

Perovskite Calcium Titanate(CaTiO_3) Nanoparticles Synthesized by Hydrothermal Synthesis with an Organic Base as Mineralizer

作　　者：杨术明[1,2] 付文红[1,2] 程轲[3] 王红军[1,2] 寇慧芝[1,2] 

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000 [2]信阳师范学院应用化学研究所,河南信阳464000 [3]河南大学教育部特种功能材料重点实验室,河南开封475001

出　　处：《信阳师范学院学报（自然科学版）》2009年第3期423-426,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(20773103);人事部留学人员科技活动择优资助项目(2006164);教育部留学回国人员科研启动基金项目(2008101);河南省教育厅科技计划项目(2008A150022)

摘　　要：以四甲基氢氧化铵(N(CH3)4OH)为矿化剂,以Ca(NO3)2和钛酸丁酯的水解产物TiO(OH)2为原料进行水热合成反应,制备CaTiO3纳米粒子.采用XRD和TEM对合成的纳米粒子进行表征.通过对各种反应条件的选择,如前驱体浓度、pH、合成温度和时间,对纳米粒子的大小和形状进行控制.结果表明,在较低的温度甚至在130℃就能形成完整的正交晶型的CaTiO3纳米粒子,并且由于使用有机碱作为矿化剂,合成的纳米粒子纯度高,而且大小均匀.因此,是制备单分散CaTiO3纳米粒子的一个十分有效的方法.CaTiO3 nanoparticles were prepared by hydrothermal method with Ca（ NO3 ）2 and TiO（OH） 2 as precursors. The nanopartieles were characterized by X-ray diffraction pattern （XRD） and transmission electron microscopy （TEM）. The sizes and morphologies of the nanoparticles were controlled with the adjustment of various reaction parameters, such as the concentrations of the precursors, pH, temperature and time, et al. The results showed that the crystallization of CaTiO3 could complete at relatively low temperatures even at 130℃. What＇ s more is that the CaTiO3 nanopartieles are highly pure and uniform in size due to the use of the organic base. Hydrothermal method is proved to be a very efficient method in the preparation of monodispersed CaTiO3 nanopartieles.

关 键 词：钙钛矿型钛酸钙 纳米粒子 水热合成 均匀 

分 类 号：O649.4[理学—物理化学]