Abstract:
The spheroid,uniform and well-dispersed superfine copper powder used in MLCC was prepared by using glucose and hydrazine hydrate to deoxidize CuSO
4 in acqueous solution.The effects of PVP,NH
4Cl 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 NH
4Cl has a great influence on the particle size and shape.With the amount of NH
4Cl increases,the copper particles become smaller,and when the value of
n(Cu):
n(NH
4Cl) 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.