高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (12): 1834.

• 论文 • 上一篇    下一篇

醇盐水解法制备钛酸铅微粉的机理研究

齐利民, 马季铭, 程虎民, 赵振国   

  1. 北京大学化学系, 北京, 100871
  • 收稿日期:1994-03-10 修回日期:1994-06-21 出版日期:1994-12-24 发布日期:1994-12-24
  • 通讯作者: 齐利民,男,25岁,硕士.
  • 作者简介:齐利民,男,25岁,硕士.
  • 基金资助:

    国家高技术项目

Investigation on the Mechanism of the Preparation of Lead Titanate Fine Powders by Hydrolysis of Alkoxide

QI Li-Min, MA Ji-Ming, CHENG Hu-Min, ZHAO Zhen-Guo   

  1. Department of Chemistry, Peking University, Beijing, 100871
  • Received:1994-03-10 Revised:1994-06-21 Online:1994-12-24 Published:1994-12-24

摘要: 采用TG-DTA、XRD、IR等手段研究了醇盐水解法制备的钛酸铅微粉的晶化行为,并用化学分析方法对微粉中可溶铅含量做了研究。结果表明,未晶化微粉中Pb以无定形PbTiO3和无定形PbO两种形式存在,当热处理温度达到晶化温度区间(430~470℃)时,无定形PbTiO3向结晶型PbTiO3的转化和无定形PbO与TiO2间的反应同时发生。

关键词: 醇盐水解, 钛酸铅, 微粉, 晶化

Abstract: The TG-DTA, XRDand IRtechniques have been used to study the crystallization behavior of lead titanate(PT) fine powders prepared by hydrolysis of alkoxide, and the content of soluble lead in the fine PTpowders has been examined by chemical analysis. The results suggest that the Pb in the PTpowders which has not been crystallized completely exists in two states, i. e. amorphous PbTiO3 and amorphous PbO. When the temperature reaches the crystallization temperature region(430-470℃), the conversion from amorphous PbTiO3 to perovskite phase of PbTiO3 and the reaction between PbOand TiO2 take place simutaneously.

Key words: Hydrolysis of alkoxide, Lead titanate, Fine powders, Crystallization

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