CORROSION-RESISTANT AND HIGH-PERFORMANCE NEODYMIUM-IRON-BORON SINTERED MAGNET, PREPARATION METHOD THEREFOR, AND USE THEREOF

The present invention provides a corrosion-resistant and high-performance sintered neodymium-iron-boron magnet, a preparation method therefor, and a use thereof. The sintered neodymium-iron-boron magnet of the present invention is prepared by pulverizing, forming, and sintering a sintered neodymium-iron-boron magnet composition. The sintered neodymium-iron-boron magnet contains: 28.5 wt% to 32.5 wt% of R; 0.88 wt% to 0.94 wt% of B; 0.1 wt% to 0.3 wt% of Ga; 1.0 wt% to 3.0 wt% of Co; and 400 ppm to 1000 ppm of O. According to the present invention, the sintered neodymium-iron-boron magnet capable of inhibiting reduction of coercive force and improving the coercive force can be obtained by means of an oxygen adding operation, and meanwhile, the corrosion resistance of the magnet can be improved.