METHOD FOR PHASE TRANSITION OF NICKEL METAL PARTICLES FROM FCC CRYSTALLINE STRUCTURE TO HCP CRYSTALLINE STRUCTURE BY HEATING CONVENTIONAL FERROMAGNETIC SUBSTANCE, FCC PHASE NICKEL POWDER, IN POLYOL

摘要

PURPOSE: To provide a method for preparing non-magnetic nickel powder from nickel precursor compound by combining a conventional nickel powder preparation method for converting nickel precursor compound into FCC(face centered cubic) phase nickel particles by using polyol as a reducing agent and a process for transition of phase of nickel particles by heating FCC phase nickel particles in polyol into a series of continuous steps. CONSTITUTION: The method for preparing non-magnetic nickel powder comprises a step(a) of reducing the nickel precursor compound into nickel metal particles having FCC(face centered cubic) crystalline structure by heating a mixture containing a nickel precursor compound and polyol; and a step(b) of heating the mixture obtained in the step(a) so that at least some of the nickel metal particles having FCC crystalline structure are phase changed into nickel metal particles having HCP(hexagonal-closest packed) crystalline structure.