PREPARATION OF FIBROUS NICKEL POWDER BY COMPLEXING PRECIPITATION-THERMAL DECOMPOSITION METHOD

Fibrous nickel powder was prepared by complexing precipitation - thermal decomposition method. The composition and morphology of the powder were characterized by the analysis methods of XRD and SEM. The effects of temperature, concentration, pH value and surfactant on the morphology and the dispersion of the precursor, and the conditions of the thermal decomposition on the morphology and the dispersion of the nickel powder have been studied. The results indicate that the nickel powder is fibrous and well dispersive, and can be prepared by thermal decomposition of the precursor, which is obtained under conditions as proposed: precipitation temperature is 60 similar to 70 degrees C, the nickel ion concentration is 0.5 similar to 0.8 mol.L-1, pH value is 8.4 similar to 8.8 and adding PVP as surfactant.