Spherical ferrite particles and ferrite resin composite for bonded magnetic core

摘要

Disclosed herein are ferrite particles for a bonded magnetic core comprising crystal grains of 5 to 15 &mgr;m in average diameter, having an average particle diameter of 20 to 150 &mgr;m and a magnetic permeability of not less than 24, and consisting essentially of 47 to 58 mol % of Fe. sub.2 O.sub.3, 10 to 30 mol % of nickel oxide, manganese oxide, nickel- managanese oxide (calculated as NiO, MnO or NiO.MnO) and 15 to 40 mol % of zinc oxide (calculated as ZnO).