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以尿素为沉淀剂制备纳米氧化锌粉体

刘超峰; 胡行方; 祖庸+   

  1. 中国科学院上海硅酸盐研究所; 上海 00050; +西北大学化工系; 西安 710069;
  • 收稿日期:1998-05-21 修回日期:1998-06-23 出版日期:1999-06-20 发布日期:1999-06-20

Nanometer-sized Zinc Oxide Prepared by Using Urea as Precipitating Agent

LIU Chao-Fend; HU Xing-Fang; ZU Yong +   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China; +Dept. of Chemical engineering Northwest University Xi an 710069 China
  • Received:1998-05-21 Revised:1998-06-23 Online:1999-06-20 Published:1999-06-20

摘要: 本文以尿素、硝酸锌为原料,采用均匀沉淀法制备了纳米级ZnO以TG-DTA热分析、红外光谱及XRD、TEM、激光衍射粒度分析仪等测试手段,对纳米级ZnO的粉体结构和形貌进行了研究.结果表明,在450℃下热处理得到的纳米ZnO粉体结晶性能良好,改变反应条件,制备了平均粒径在15~80nm,粒度分布窄,分散性好的纳米ZnO粉体.文中亦对过饱和度对粉体粒径大小的影响以及均匀沉淀法形成纳米氧化锌的机理进行了探讨.

关键词: 纳米氧化锌, 均匀沉淀法, 成核及其生长, 过饱和度

Abstract: Nanometer-sized ZnO particles were prepared by using a homogeneous precipitation method, urea and zinc nitrate as the starting materials.
Microstructure and morphology of nanometer-sized ZnO were investigated by means of TG-DTA, IR absorption spectra, X-ray diffractometry
, TEM and Laser particle size analyzer. The results indicated that well-crystallized nano-ZnO was obtained with annealing temperature at 450℃. Narrow-
sized, finely dispersed nano-ZnO with a size of 15~80nm was available by controlling reactant conditions. The effects of supersaturation on particle
sizes and formation mechanism of nano-ZnO were also discussed.

Key words: nanometer-sized ZnO, homogeneous precipitation method, nucleation and growth, super saturation degree

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