METHOD FOR PREPARING NEODYMIUM-IRON-BORON PERMANENT MAGNETIC MATERIAL

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Disclosed is a method for preparing a neodymium-iron-boron permanent magnetic material. The method comprises : preparing a neodymium-iron-boron magnetic material, depositing heavy rare earth particles or high melting particles on the neodymium-iron-boron magnetic powder by means of a physical vapor deposition process; and orienting, forming and then sintering same to obtain a neodymium-iron-boron magnet. By the present invention, the heavy rare earth particles or high melting particles are dispersed evenly within the magnet at the grain boundary, with coercive force of the magnet being increased and the amount of heavy rare earth used being reduced, so that the coercive force of the neodymium-iron-boron magnet is significantly increased.