文献类型：期刊文献

中文题名：高分子保护化学还原法制备纳米Ag粉

英文题名：Preparation of Nanometer-sized Silver Powder by Polymer Protection Method

作者：张宗涛[1];赵斌[1];胡黎明[1];朱孟钦[1]

机构：[1]华东理工大学国家超细粉末工程研究中心,华东理工大学化学系

年份：1995

卷号：21

期号：4

起止页码：423

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;CSCD:【CSCD2011_2012】；

基金：上海市重大基础科学研究资助项目

语种：中文

中文关键词：制备;纳米粉末;高分子保护;化学还原;银粉

外文关键词：silver;preparation;nanopowders;polymer protection; chemical reduction

摘要：以聚乙烯吡咯烷酮为高分子保护剂，以水合肼为还原剂，在水溶液中制备了平均粒径为３０～１００ｎｍ的球型银粉。结果表明：水合肼和ＡｇＮＯ＿３的比例较大、反应时间适当延长，有利于提高银粉产率。较高的反应温度和添加细小晶种有利于形成小晶粒银粉。保护剂与银盐的比例是影响银粉团聚和形状的关键参数，该比例为１：１时效果最佳，银颗粒彼此相互不团聚，颗粒呈球型，粒度小于１００ｎｍ。
Spherical silver powder with the diameter of 30～100nm and the grain size dis-tribution of 1.3～1. 5 was prepared using the reduction reaction of silver nitride by hydrazinehydrate with polyvinyl pirrolidone(PVP ) protection. The influences of mole ratio of hy-drozine/AgNO_3 ,mass ratio of PVP/AgNO_3,reduction time and temperature ,seed addition onsilver particle size particle aggregation and size distribution were investigated. The silvonpowder yield was about 99. 99% only at the reaction time more than 20 min,and the mole ra-tio of hydrozine/AgNO_3 more than 6.Higher reaction temperature and seed addition were fa-vorable to form smaller silver particles. The key issue for the silver particle size and aggrega-tion was the mass ratio of PVP/AgNO_3. The nanometer sized silver powder without any ag-glomerates was obtained in the case of PVP/AgNO_3≥1,whereas the powder containing largeaggremerators with irregular shapes was found,if the PVP/AgNO_3<1 was kept.