| abstract |
Magnetic particles having an average particle size of 10 to 200 mum, comprising:magnetic core particles; anda coating layer formed on each surface of said magnetic core particles, comprising at least one metal alkoxide represented by the general formula (I): wherein R is a C1 to C16 alkyl group; M is Al, Ti, Na,K, Ca, Zn or Fe; and n is an integer of 1 to 4, at least one silane-based coupling agent, and a silicone resin.Such magnetic particles have an excellent durability and a stable charging property. |