中华医学超声杂志

应用化学 ›› 1993, Vol. 0 ›› Issue (2): 99-101.

• 研究简报 • 上一篇    下一篇

化学共沉法制备PbTiO3微粉

赵振国, 马季铭, 程虎民, 羌笛   

  1. 北京大学物理化学研究所 100871 北京
  • 收稿日期:1992-04-20 修回日期:1992-09-14 出版日期:1993-04-10 发布日期:1993-04-10
  • 基金资助:
    国家高技术研究项目

PREPARATION OF PbTiO3 POWDERS BY COPRECIPITATION METHOD

Zhao Zhenguo, Ma Jiming, Cheng Humin, Qiang Di   

  1. Department of Chemistry, Peking University, 100871 Beijing
  • Received:1992-04-20 Revised:1992-09-14 Published:1993-04-10 Online:1993-04-10

PDF

396

摘要： 钙钛矿型PbTiO3是铁磁性材料,具有高居里温度,低介电常数和明显的各向异性参数,是一种有应用前景的复合材料成分。现已报道的制备方法有:混合氧化物法,溶胶-凝胶法,水热法和化学共沉法等。共沉法大多用TiCl4、Pb(NO3)2等水溶性物质为原料,以水为溶剂,故成本低,便于使用稀溶液。但是,TiCl4易水解,难以准确配制溶液,操作条件较繁琐,给制备粒径小、纯度高的微粉带来一定困难。为此,我们对化学共沉法做了改进,不用TiCl4,避免了精确配比和实验操作上的困难,使用有机溶剂,铅、钦化合物配成均匀混合液,有利于形成均匀沉淀.本工作还考查了介质pH,H202的使用、反应温度和时间等对制得PbTiO3微粉的纯度及粒径的影响.

关键词: PoTiO3, 粉体, 共沉法

Abstract: The pure perovskite-lead titanate powders were prepared by coprecipitation method. The ethanol solution of the Ti(OC4H9)4 and methanol solution of the PbAc2 were mixed at a 1:1 molar ratio of Pb to Ti. Under intensive stiring the mixed solution was added dropwise to the water followed by adding H2O2 solution. The pH of the solution was adjusted to 8.9～9.2. by adding NH4OH. The resulted precipitate was washed with deionized water and then dried at 100℃. The dried material was pestled and calcined at temperature above 550℃ to yield PbTiO3 powders.

Key words: PbTiO3, powder, coprecipitation

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