A Composite Rare Earth Anisotropic Bonded Magnet and a Preparation Method Thereof

Composite rare earth anisotropic bond magnets and their manufacturing methods, wherein composite rare earth anisotropic bond magnets include Nd-Fe-B-based magnetic powders, Sm-Fe-N-based magnetic powders, adhesives and inorganic nanodispersants; The adhesive comprises a resin; The preparation method comprises an Nd-Fe-B-based magnetic powder prepared by the HDDR method, an Sm-Fe-N-based magnetic powder prepared by the powder metallurgy method, and the Nd-Fe-B-based magnetic powder, the Sm-Fe-N-based magnetic powder, the adhesive and the inorganic nano-dispersant are mixed in a certain proportion to finally prepare a composite rare earth anisotropic bond magnet. The present invention provides sufficient dispersion for the fine Sm-Fe-N powder during the mixing process of the Sm-Fe-N-based magnetic powder and the Nd-Fe-B-based magnetic powder and the adhesive through the addition of an inorganic nanodispersant, so that the fine Sm-Fe-N powder and the adhesive are uniformly coated on the surface of the anisotropic Nd-Fe-B-based magnetic powder, and further improve the density and tissue uniformity of the composite magnet.