Preparation of Ultrafine Ni Powders by Liquid Phase Reduction Technique from Water Solution

Ultrafine nickel powder was synthesized via a facile and mild liquid phase reduction method from water solution with nickel chloride as raw material,hydrazine as reductive agent,and sodium hydroxide as pH adjusting agent.The effects of the reaction conditions on the microstructures of the Ni target products were investigated based on analyses of scanning electron microscopy and X-ray diffraction.The results indicated that the high purity particles had the face-centered cubic crystal structure and their final diameters were between 200 and 500 nm with narrow size distribution.