MANUFACTURE OF MAGNETIC IRON POWDER OF HIGH FILLING ADAPTABILITY AND ORIENTATIONAL PROPERTY

PURPOSE:To give a high orientational property and a high filling adaptability to magnetic powder by a method wherein a dispersion treatment is performed by the disperser, in which a slurry dispersion medium of iron oxyhydroxide is used, in the first half stage wherein a magnetic adjusting component and/or a configulation retaining component is coated. CONSTITUTION:After a magnetic adjusting component and/or a configulation retaining component is coated on the surface of rinsed iron oxyhydroxide grains, said component is reduced using hydrogen. At that time, in the stage before the coating operation is performed, a mechanical shear force applying treatment is performed on the iron oxyhydroxide by applying rinsed iron oxyhydroxide in the state wherein the dispersion medium is being rotated at high speed or circulated by a pin. As a result, a high orientational property and a high filling adaptability can be given to the magnetic powder.