Patent ID: 9541853
Date: 2017-01-10
CPC Classifications: G03G

Claim:
1. A magnetic carrier comprising: resin-filled magnetic core particles containing porous magnetic particles having pores therein and a resin present in the pores; and resin coating layers coating the surfaces of the resin-filled magnetic core particles, the resin coating layer including a coating resin, wherein: (i) the porous magnetic particles are made of Mn-Mg-Sr ferrite; (ii) the porous magnetic particles have a specific resistance in the range of 1.0×10 (iii) the porous magnetic particles have an electrical breakdown at electric field intensity in the range of 1,000 V/cm to 10,000 V/cm, and wherein: (iv) the magnetic carrier has a specific resistance in the range of 1.0×10 (v) the magnetic carrier has a specific resistance in the range of 2.0×10 (vi) the magnetic carrier has an electrical breakdown at electric field intensity in the range of 1,000 V/cm to 15,000 V/cm; (vii) the magnetic carrier exhibits a current in the range of 8.0 μA to 50.0 μA when a voltage of 500 V is applied thereto; and (viii) the resin content in the resin-filled magnetic core particles is in the range of 1.0 to 5.5 parts by mass relative to 100 parts by mass of the porous magnetic particles.