Effects of Additive Agent on the Morphology of Superfine Copper Powders for MLCC Electrode

The spheroid,uniform and well-dispersed superfine copper powder used in MLCC was prepared by using glucose and hydrazine hydrate to deoxidize CuSO₄ in acqueous solution.The effects of PVP,NH₄Cl and NaOH on copper powders are studied.The results show that an amount of PVP is beneficial to the uniformity and sphericity of copper powder and NH₄Cl has a great influence on the particle size and shape.With the amount of NH₄Cl increases,the copper particles become smaller,and when the value of n(Cu):n(NH₄Cl) is 1:1,the copper particles become cuboid from spheroid.NaOH can effectively eliminate the wrinkle of copper particles,at the same time,the copper particles become smaller,too.