高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (2): 294.

• 论文 • 上一篇    下一篇

电子陶瓷粉BaTiO3的液相合成技术(Ⅲ)──前驱体草酸氧钛钡的热分解反应动力学研究

顾达, 王相田, 郑柏存, 胡黎明   

  1. 华东理工大学技术化学物理研究所, 上海 200237
  • 收稿日期:1995-04-12 修回日期:1995-07-18 出版日期:1996-02-24 发布日期:1996-02-24
  • 通讯作者: 顾达,男,40岁,硕士,副教授
  • 作者简介:顾达,男,40岁,硕士,副教授
  • 基金资助:

    上海市青年“启明星”基金;上海市新兴技术产业办公室发展基金

Preparation Technology of Electronic Ceramic BaTiO3 Powder in Liquid Phase(Ⅲ)──Studies on the Thermal Decomposition Reaction Kinetics of Precursor BaTiO(C2O4)2·4H2O

GU Da, WANG Xiang-Tian, ZHENG Bai-Cun, HU Li-Ming   

  1. Technical Chemical Physics Institute, East China University of Science and Technology, Shanghai 200237
  • Received:1995-04-12 Revised:1995-07-18 Online:1996-02-24 Published:1996-02-24

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摘要： 以Brodio线性化简单图解法对前驱体草酸氧钛钡热分解过程中三段动力学参数进行了计算。结果表明,三段热分解的反应级数分别为2、2和0,活化能为96.8、165.1和172.2kJ/mol,频率因子为1.03×1011、5.64×108和2.63×106s-1.由热分解动力学参数优化热处理工艺制得高纯超细BaTiO3粉体。

关键词: 钛酸钡, 草酸氧钛钡, 电子陶瓷粉, 热分解反应动力学

Abstract: The kinetic parameters of the three steps of thermal decomposition of the BaTiO(C2O4)2·4H2O are calculated according to the Broido's linearized simple graphical procedure.It is shown that three-step-reaction orders are 2,2,0;the activation energies are 96.8,165.1,172.2kJ/mol and that the frequency factors are 1.03×1011,5.64×108,2.63 ×106s-1,respectively.The conditions of the process of thermal treatment are optimized according to the kinetic parameters.The powder obtained are ultrafine BaTiO3 with a high purity.

Key words: Barium titanate, Barium titanyl oxalate tetrahydrate, Electronic ceramic powder, Reaction.kineticcs

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