Process for preparing ferromagnetic particles comprising metallic iron.

摘要

A process for preparing ferromagnetic iron particles comprising metallic iron as the major component by reduction of particles of an iron oxide under heating, characterized in that the iron oxide particles are provided with a first coating layer containing at least one metal compound chosen from compounds of aluminum, zinc and alkaline earth metals atthe surfaces and a second coating layer containing at least one silicon compound thereon before the reduction, whereby the coated particles are prevented from sintering and breaking on the reduction so as to give ferromagnetic particles of metallic iron having an excellent magnetic characteristics.