SPINEL TYPE FERRIMAGNETIC FINE PARTICLE POWDER CONSISTING OF IRON-COBALT-NICKEL AND METHOD OF PREPARING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a magnetic particle powder having improved magnetic characteristics and particularly large coercive force with the micronization of a spinel type ferrimagnetic particle.;SOLUTION: The spinel type ferrimegnetic fine particle powder consisting essentially of cobalt and nickel has a compositional formula expressed by (CoO)_x(NiO)_y-n/2Fe₂O₃ (compositional formula Co_xNi_yFe₂O₄) where the ratio of Fe to (Co+Ni) is 3.0Fe/(Co+Ni)2.0, x0, y0 and x+y=1.;COPYRIGHT: (C)2004,JPO&NCIPI