球形纳米银粉的制备与微结构研究  

Preparation and microstructure of silver nanopowder with spheric morphology

作　　者：李明利[1,2] 周宇松[2] 纪松[2] 钱坤明[2,3] 倪杨[2,3] 杜丕一[1] 

机构地区：[1]硅材料国家重点实验室浙江大学材料科学与工程系,浙江杭州310027 [2]中国兵器科学研究院宁波分院,浙江宁波315103 [3]宁波表面工程研究中心,浙江宁波315103

出　　处：《兵器材料科学与工程》2010年第4期1-3,共3页Ordnance Material Science and Engineering

基　　金：国家46批博士后基金(20090461406);宁波市自然科学基金(2009A610040)

摘　　要：以硝酸银为原料,以对苯二酚C6H4(OH)2作为还原剂,添加链烷醇胺A作分散剂,液相化学还原法制备出分散性良好的球形纳米银粉。用激光粒度分布仪测试银粉的粒度分布与平均粒径,用透射电子显微镜(TEM)分析银粉的形貌、粒径和团聚状态,用多晶X射线衍射仪(XRD)检测粉体的晶相。实验结果表明:制备的纳米银粉为面心立方晶体结构,呈现规则球形,并且具有狭窄的粒度分布,其平均粒径约为100 nm,振实密度约为4.0 g/cm3。The silver nanopowder with monodispersity was prepared by chemical reduction method using AgNO3 as raw material.Hydroquinone and chain triacontanol amine were chosen as reductant and dispersant agent,respectively.The laser fineness gage was used to investigate the grain size distribution and the average diameter of Ag powder.The microstructure,particle size and agglomerating state of Ag powders was examined by Transmission Electron Microscope（TEM）.The phase composition of Ag powders was characterized by X-ray diffraction（XRD）.The Ag powder obtained is in face-centered cubic crystal structure with quasi-orbicular morphology.The grain size distribution is relatively close and the average particle size is about 100 nm.The average tap density of silver powders is up to 4.0 g/cm^3.

关 键 词：银 纳米粉体 化学还原 微结构 

分 类 号：TG146.32[一般工业技术—材料科学与工程]