电解法制备超细铜粉的工艺及性能研究

研究了电解液组成、工艺条件及阳极种类对电解铜粉粒度、产量、电流效率和电耗的影响,分析了电解法制备的超细铜粉的表面形貌和相结构.研究结果表明:极间距增大,铜粉粒度变粗,电流效率降低,电耗增加.混合酸浓度和电流密度提高,铜粉粒度变细,电流效率降低,电耗升高.电解液温度升高和刮粉周期增长,铜粉粒度变粗,电流效率提高,电耗降低;采用不溶性阳极进行电解时,能够有效地起到控制铜粉粒度的作用,但产量较低.

Study on Process and Performance of Ultrafine Copper Powder Prepared by Electrolytic Method

Effects of electrolyte composition,process conditions and anode types on particle size and output of electrolytic copper powder,current efficiency and the consuming of electric energy were studied,and surface morphology and phase structure of electrolytic copper power were analyzed.The results show that increasing the distance between electrodes results in the grain size of electrolytic copper power coarsened,current efficiency reduced and the consuming of electric energy increased.Increasing mixed acid concentration and improving current density result in the grain size of electrolytic copper power being fined,current efficiency reduced and the consuming of electric energy improved.Increasing electrolyte temperature and the period of scraping powder result in the grain size of electrolytic copper power coarsened,current efficiency improved and the consuming of electric energy reduced.While adopting the indissoluble anode to electrolyze,it can play a role in controlling the grain size of the electrolytic copper powder effectively,but the output is lower.