Preparation of ultrafine nickel powder by polyol method and its oxidation product

摘要

Ultrafine nickel powders have been prepared by polyol method using NaOH, Ni(NO_3)_2 · 6H_2O, ethylene glycol (EG) and polyvinylpyrrolidone (PVP) as raw materials at different conditions. Effects of water content of Ni(OH)_2 and concentration of NaOH on preparation nickel powders were studied. X-ray diffraction (XRD) patterns showed that the nickel powders were not only face-centered cubic crystallite, but also hexagonal crystallite when the concentration of NaOH increased. In addition, the oxidation products were studied and CO_3~(2-) of the products was identified through IR spectrum.