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采用一步还原、二步还原的工艺,以单一还原剂或复合还原剂制备超细铜粉,并用松装比测定仪、激光粒度分布仪、XRD、SEM对铜粉进行了表征。结果表明,用2 mol/L葡萄糖预还原,用1.1mol/L甲醛和2.2 mol/L水合肼复合还原剂二步还原,可以制备性能优良的玫红色铜粉,其表面形貌为球形或类球形,粒度为3～5.59μm,分布均匀,无团聚,分散性好;用其作为基体制备出了表面镀层致密性好、包覆完全、包覆层平均厚度达到336nm,同时具有较好的导电性和抗氧化性的银包铜粉。
A one-step reduction and two-step reduction process were used to prepare ultrafine copper powder with single reductant or composite reductant. Copper powder was characterized by X-ray powder diffraction (XRD) and transmission electron microscopy (SEM). The results showed that the good red rose copper powder could be prepared by pre-reduction with 2 mol / L glucose and two-step reduction with 1.1 mol / L formaldehyde and 2.2 mol / L hydrazine hydrate. The surface morphology was spherical or similar Spherical, particle size of 3 ~ 5.59μm, uniform distribution, non-agglomeration, good dispersion; prepared with its substrate as the dense surface coating, fully coated, the average cladding thickness of 336nm, while having good conductivity Sexual and antioxidant waffle copper powder.