粗银法制备高纯度片状银粉的研究  

Preparation of High Purity Flake Silver Powders from Unpurified Silver

作　　者：周全法[1] 李锋[1] 张纪霞[1] 谈永祥[2] 

机构地区：[1]江苏技术师范学院应用化学系,江苏常州213001 [2]扬州教育学院化学系,江苏扬州225001

出　　处：《稀有金属》2003年第4期467-469,共3页Chinese Journal of Rare Metals

基　　金：江苏省教育厅自然科学基金资助项目 ( 0 0KJB15 0 0 12 )

摘　　要：以未经电解的粗银为原料 ,氧化银和银氨溶液为中间产物 ,用甲醛为还原剂 ,采用行星式球磨方式可以制备高纯度片状银粉。控制还原速度、定时对调相对的球磨罐和适当酸洗产品是得到高质量片状银粉的关键。用XRD ,TEM和SEM等手段对所得片状银粉进行了表征 ,所得产品纯度很高 ,工艺稳定性好 ,生产成本可以明显降低 ,适用于中小企业生产。High purity flake silver powers, which are mainly used as electric paste in electric industry, can be manufactured by the novel method using unpurified silver as raw material. XRD, TEM and SEM were used to characterize the products. The reducing speed, the exchanging of the vis à vis milling tanks at some regular period and the washing of the flake silver powders by hydrochloric acid are the key factors to obtain high quality flake silver powders.

关 键 词：粗银 片状银粉 制备 高纯度 

分 类 号：TQ131.2[化学工程—无机化工]