超细镍粉的制备及磁性能

Spherical and aristate spherical nickel powders were prepared in ethylene glycol solutions by composite method of aqueous reducing method and reverse micelle microemulsion. The elements of nickel powders were analyzed by X-ray diffraction and the micro-morphology and size was characterized by field emission scanning electron microscope and the magnetic properties were observed. The results showed spherical and aristate spherical nickel powders with different diameters could be prepared. With nickel diameter increasing, saturation magnetization was increased and residual magnetization and coercivity was decreased. Aristate spherical nickel powders had higher coercivity than spherical nickel powders.