硬脂酸凝胶法制备纯相BaTiO_3纳米粉体  

Low-temperature Preparation of Pure BaTiO_(3) by SAG Method

作　　者：刘亮[1] 王立秋[1] 薛冬峰[1] 刘美男[1] 刘长厚[1] 

机构地区：[1]大连理工大学化工学院材料化工系精细化工国家重点实验室,大连116012

出　　处：《人工晶体学报》2006年第5期1047-1051,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(No.20471012);全国博士学位论文作者专项基金(No.200322);高等学校博士学科点专项科研基(No.20040141004);新世纪优秀人才支持计划(NCEF-05-0278)资助项目

摘　　要：本文以硬脂酸、硬脂酸钡和钛酸丁酯为原料，采用硬脂酸凝胶法合成了纯相BaTiO3纳米粉体。为了有效控制BaTiO3在制备过程中易产生杂相的问题，我们设计了程序升温煅烧法，即通过控制不同阶段的升温速率，在550℃下成功合成了BaTiO3纳米粉体。通过X射线衍射和透射电子显微镜的观察，分析了BaTiO3粒子的晶相结构、结晶度、粒径及纳米晶体的形貌。结果表明，采用程序升温煅烧法制备的BaTiO3纳米粉体纯度高、分散性好、粒径小（25-40nm）。本文为在温和条件下制备纯相BaTiO3纳米粉体提供了一条新途径。Barium titanate nano-powders were synthesized at 550℃ by stearic acid-gel method （SAG）using stearic acid, barium stearate and tetrabutyl titanate as raw materials. The method of sequence heating calcination was designed to efficiently avoid the formation of the impurities in the synthesis process. The particle phase and crystallinity were characterized by X-ray diffraction （XRD） and the particle diameter and the morphology of the powder were investigated by transmission electron microscope （TEM）. It is found that the synthesized barium titanate powders are purity, well dispersive, and small size by SAG method, which can be an efficient route to synthesize purity barium titanate powder in mild conditions.

关 键 词：溶胶凝胶法 BaTi03 纳米粉体 SAG法 程序升温 

分 类 号：O78[理学—晶体学]