Rare earth permanent magnet material and its preparation method and motor

Abstract

The invention relates to the field of material technology, and discloses a rare earth permanent magnet material, a preparation method thereof and a motor. The rare earth permanent magnet material contains 100 parts by weight of a main alloy and 0.005-5.5 parts by weight of multiferromagnetic nanoparticles, and the group of the main alloy is R a‑x RH x Fe 100‑a‑b‑c‑ d co d m c B b , a, b, c, d and x are percentages by weight, 26≤a≤33; 0.9≤b≤1.2; 0≤c≤1; 0.1≤x≤8.5; 0.5≤d≤1.5; R is Pr, Nd , at least one of La, Ce and Gd; RH is Dy and / or Ho; M is Al, Cu, Ti, V, Cr, Zr, Hf, Mn, Nb, Sn, Mo, Ga, Si, Bi and Pb At least one of them; the rare earth permanent magnet material has improved coercive force, high-temperature coercive force and high-temperature anti-demagnetization ability under the condition of keeping the remanence and magnetic energy product basically unchanged.

Description

technical field [0001] The present invention relates to the technical field of materials, in particular to a rare earth permanent magnet material, a method for preparing a rare earth permanent magnet material, a rare earth permanent magnet material prepared by the method, and a motor including the rare earth permanent magnet material . Background technique [0002] Rare earth permanent magnets are high-tech materials and high-tech products that are encouraged and supported by the state. They are widely used in wind power generation, energy-saving elevators, frequency conversion air conditioners, new energy vehicles, automotive EPS and other new energy, energy saving and environmental protection, intelligent robots and other fields, as well as traditional VCMs, mobile phones and other consumer electronics. New energy vehicles basically use rare earth permanent magnet drives as power. As one of the core components of new energy vehicles, the driving characteristics determine ...

AI Technical Summary

Problems solved by technology

Using this method, the Al nanoparticles are uniformly distributed in the main phase Nd 2 Fe 14 On the surface of B grains, a non-magnetic NdAl grain boundary phase is formed, which enhances the demagnetic coupling effect between grains and the nucleation field of reverse magnetization domains, thereby improving the coercive force of the magnet, but for the magnet applied to the drive motor, the coercivity The coercive force is not enough to resist various demagnetization factors, and it is necessary to develop permanent magnets with higher demagnetization resistance

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