Patent ID: 6017667
Filing Date: 2000-01-25
Classification: G03G,H01F

Abstract:
Spherical composite particles having an average particle size of 1 to 1,000 .mu.m, a volume resistivity of 10.sup.10 to 10.sup.13 .OMEGA.cm and a coercive force of 100 to 4,000 Oe, comprising:magnetically hard particles, magnetically soft particles and a phenol resin as a binder,the total amount of said magnetically hard particles and said magnetically soft particles being 80 to 99% by weight based on the total weight of said spherical composite particles, and the ratio (.phi.a/.phi.b) of an average particle size (.phi.a) of said magnetically hard particles to an average particle size (.phi.b) of said magnetically soft particles being more than 1.2.