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无机材料学报

无机材料学报

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纳米ZnO制备工艺中ζ电位与分散性的关系

李强; 高濂; 奕伟玲; 严东生   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:1998-11-30 修回日期:1999-01-05 出版日期:1999-10-20 网络出版日期:1999-10-20

Relation between Potential and Dispersity in the Preparation Processof Nano-scale ZnO

LI Qiang; GAO Lian; LUAN Wei-Ling; YAN Dong-Sheng   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute ofCeramics; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1998-11-30 Revised:1999-01-05 Published:1999-10-20 Online:1999-10-20

PDF (PC)

1189

被引次数

244

摘要： 本工作采用化学工艺制备１０ｎｍ左右的ＺｎＯ粉体，并对工艺过程中碱式碳酸锌前驱体分散性和表面电位之间的关系进行了研究．专门对洗涤后粉体表面电位进行了分析．发现采用蒸馏水洗涤后粉体的ζ电位明显降低，接近其等电点，并导致粉体团聚．因此，在洗涤过程中，使用０．１Ｍ氨水取代蒸馏水来控制ｐＨ值，提高电位，改善粉体的分散性．

关键词: ZnO, 纳米, 电位, 团聚, 洗涤

Abstract: Nano-scale powders (about 10nm) of ZnO were prepared by chemical method. Also the relation between ζ potential and dispersity of zinc
carbonate hydroxide precursor in the procedure was studied. After being washed, the ζ potential of particles was specially examined. It was found that the ζ potential of particles decreased obviously and closed to its
isoelectric point after being washed by distilled water. This phenomenon certainly caused the aggregation of particles. So in washing process, the 0.1M ammonia was
used instead of distilled water to controll pH value and increase ζ potential. Finally the dispersity of powders was improved.

Key words: ZnO, nano-scale, ζ potential, aggregation, washing

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