ZHANG Qiong, ZHANG Junji, TAO Shuang, ZHOU Hui, TANG Ting

(School of Materials Science and Engineering, Dalian Jiaotong University, Dalian, Liaoning 116028)

Abstract:Spherical, rod, triangular platelike copper microparticles were synthesized using CuSO₄·5H₂O and NaH₂PO₂·H₂O as raw materials and EDTA-2Na as surfactant by controlling the temperature of liquid-phase-reduction reaction. The as-prepared copper powders were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The experiment results show that the amount of EDTA -2Na had a significant effect on the morphology of the products which had fine dispersity and morphology when the molar ratio of Cu²⁺/EDTA was 05. Elevated reaction temperature was conducive to the generation of pure copper. Copper powders with the cubic crystal structure of spheres, rods and triangular platelets were obtained when the reaction temperature was between 80°C and 90℃.

Key words:  copper powder; morphology; liquid-phase-reduction method