COMPOSITION FOR ALNICO-BASED COMPOSITE MAGNET, ALNICO-BASED COMPOSITE MAGNET AND MANUFACTURING METH

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PURPOSE : A composition for an alnico-based composite magnet, the alnico-based composite magnet and a manufacturing method thereof, and a hetero-junction alnico-based composite magnet using the same are provided to enhance coercive force with proper remnant magnetization by adding samarium-cobalt powder, rare earth magnetic substance, to alnico magnetic substance. CONSTITUTION : A manufacturing method of an alnico-based composite magnet includes the steps of : manufacturing magnetic powder by mixing 60 to 99 wt%% of alnico powder having size of 150 to 300μm with 1 to 40wt%% of samarium-cobalt powder having size of 50 to 120 um; and drying, grinding, compression-molding, and hardening after mixing 90 to 98wt%% of magnetic powder with 2 to 10wt%% of a binder. The binder is a compound of epoxy resin, a hardener, and a hardening accelerator. © KIPO 2008