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Chem. J. Chinese Universities ›› 1996, Vol. 17 ›› Issue (2): 294.

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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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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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