【摘 要】
：
Submicron copper microcrystal was synthesized by reducing Cu2O with hydrazine hydrate as reducer in aqueous solution,and was characterized by X-ray diffraction
【机 构】
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School of Metallurgical Science and Engineering,Jinchuan Ni&Co Research Engineering Institute
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Submicron copper microcrystal was synthesized by reducing Cu2O with hydrazine hydrate as reducer in aqueous solution,and was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The shapes of copper microcrystai de-pend on additives. Cubic copper particles were observed when the inorganic salt containing Cl-, such as NH4Cl, NaCl, or KCl, was added into the reaction system. By combined use of NH4Cl and polyvinylpyrrolidone (PVP), the proportion of cubic copper particle number exceeded 90%, and the particle size is 0.1~0.5 μm. While other inorganic salt without Ci-, such as Na2SO4 or (NH4)2SO4,had little effect on the shapes of the copper particles. The growth mechanism of metallic copper crystal in aqueous solution was ana-lyzed. It is suggested that the formation of cubic copper crystals is ascribed to the selective adsorption of Cl- on copper crystal (100)faces.
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