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无机材料学报

无机材料学报

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组份均匀分布的球形实心钛酸钡超细粉体的喷雾水解反应法制备和表征

徐华蕊1; 高濂1; 郭景坤1; 古宏晨2   

  1. 1. 中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室, 上海 200050; 华东理工大学技术化学物理研究所, 上海 200237
  • 收稿日期:2001-09-03 修回日期:2001-09-27 出版日期:2002-09-20 网络出版日期:2002-09-20

Preparation and Characterization of Spherical, Solid Barium Titanate Ultrafine Powders with Uniform Composition by Spray Hydrolysis Reaction

XU Hua-Rui1; GU Hong-Chen2; GAO Lian1; GUO Jing-Kun1   

  1. 1.Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China;2. East China University of Science & Technology; Shanghai 200237; China
  • Received:2001-09-03 Revised:2001-09-27 Published:2002-09-20 Online:2002-09-20

PDF (PC)

1236

被引次数

29

摘要： 采用喷雾水解反应法得到粒径在0.5～2μm之间球形实心、单个粉体内钡钛比也完全均匀的钛酸钡粉体.实验结果表明,水解反应和沉淀反应段的温度及长度、和草酸二甲酯的浓度是影响产物保持球形和组份是否均匀的主要因素.采用喷雾水解反应法获得理想钛酸钡超细粉体的工艺条件为:反应段温度>85℃,反应段停留时间>3s;DMO浓度>0.75mol/L.

关键词: 喷雾水解反应法, 钛酸钡, 组份分布, 草酸二甲酯

Abstract: The spherical, solid BaTiO3 powders with 0.5～2μm and uniform composition were prepared by the spray hydrolysis reaction method. The main factors on the preparation of solid and uniform composition powders are reaction temperature and time, and the concentration of dimethyl oxalate (DMO), which is the inter-precipitator. The optimum conditions for the preparation of ideal powders are that the reaction temperature is more than 85℃, and the time is more than 3s, and the concentration of DMO is more than 0.75 mol/L.

Key words: spray hydrolysis reaction, barium titanate, composite distribution, dimethyl oxalate

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