Effect ofprecursors on density of copper powder by a two-step liquid reduction method

Copper powders and cuprous oxide particles were prepared by a two-step liquid reduction method.Cubic,spherical,octahedral cuprous oxide particles were used as precursors respectively and the effect of the precursors on density of copper powders was investigated.The products were characterized by XRD,SEM,nitrogen adsorption specific surface analyzer and particle size distribution.The results showed spherical copper powders which were prepared using cubic cuprous oxide particles as precursors had a high tap density,a small specific surface area and a narrow size-distribution,and applied to conductive copper paste.