文献类型：期刊文献

中文题名：银超细粉末的制备

英文题名：Preparation of Ultrafine Silver Powders

作者：赵斌[1];马海燕[1];张宗涛[1];胡黎明[1]

机构：[1]华东理工大学化学系,华东理工大学国家超细粉末工程研究中心

年份：1996

卷号：22

期号：2

起止页码：221

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;;国家哲学社会科学学术期刊数据库;Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：银;超细粉末;制备;葡萄糖

外文关键词：silver;ultrafine particle;preparation;glucose

摘要：探讨了以葡萄糖为还原剂，聚乙烯吡咯烷酮为分散剂，在碱性条件下还原硝酸银水溶液制备银超细粉末的反应机理及工艺条件。结果表明，在碱性葡萄糖溶液中还原硝酸银的反应，是经中间产物氧化银而转变为银的，此过程于瞬间完成。用该法制备的银超细粉末的粒径范围为１００～２５０ｎｍ（团聚体平均尺寸）。反应温度、反应物浓度，及反应液的最终ｐＨ值是影响粒径的主要因素。
This paper studied the preparation of ultrafine silver powders by reduction of silver nitrate with glucose in aqueous solution under the basicity condition,and poly(N-vinly-2-pyrrolidone) (PVP) as the dispersive polymer. Reduced in basicity glucose solution through the Ag2O intermediate product,silver nitrate changed into silver particles,this process was completed rapidly.The Ag2O intermediate products was identified by TGA,and the final product-silver powders were characterized by XRD.The range of particle size of ultrafine silver particles prepared by this method was from 100 to 250nm(average size of aggregates).The temperature, the concentration of reactants and the pH of the reaction system were the main factors effecting the particle size.