电解法制备超细铜粉的工艺研究

采用脉冲电解法,在硫酸铜与硫酸混合电解溶液体系中,就不同脉冲电解参数对阴极铜粉形貌和粒度的影响进行了研究.实验获得合适的脉冲参数为平均电流密度i=600 A/m2,脉冲宽度ton=8ms,占空比为1∶3,在此条件下,所得铜粉平均粒度为0.87μm,有90%颗粒粒径小于1.25μm,阴极沉积出的铜粉颗粒粒度在0.24~1.79μm之间,粒度分布均匀.

Study on process of ultrafine copper powders prepared by electrolytic method

The effects of different pulse electrolysis parameter on the copper powder morphology and granularity were studied in the CuSO4 and H2SO4 electrolyte system by the pulse electrolytic method. The optimal technical condition for copper pulse electrolysis is investigated in the laboratory under the condition on of 600A/m^2 mean current density, 8.0ms for a pulse and pulse duration ratio 1 ： 3. The average diameter of the copper powders which were obtained on this condition is 0. 87μm, and 90% grain size is less than 1.25μm. The grain size of aggradated copper powder is between 0. 24 to 1.79μm in cathode and grain fineness distribution is average.