Rare earth permanent magnet material and preparation method and application thereof

Abstract

The invention discloses a rare earth permanent magnet material and a preparation method and application thereof. The raw material composition of the rare earth permanent magnet material comprises thefollowing components: R: 28.5-33%, R beig a rare earth element and comprising Nd; B: 0.84%-0.94% of the total weight of the raw materials; Ga: 0.6 < Ga < = 1.8%; Co: < = 2.5%; Fe: 61.6-69 %; wherein Ncomprises one or more of Ti, Zr and Nb. When N contains Ti, the content of Ti is 0.15%-0.25%. When N contains Zr, the content of Zr is 0.2%-0.35%. When N contains Nb, Nb is 0.2%-0.5%, wherein the percentage is the percentage of each component in the total mass of the rare earth permanent magnet material. According to the rare earth permanent magnet material, under the condition that no heavy rareearth element is added, a low-boron aluminum-free system is adopted, the magnetic properties such as residual magnetism, coercive force, temperature stability and squareness are still good, and meanwhile the magnetic properties of permanent magnet materials of the same batch are uniform.

Description

technical field [0001] The invention specifically relates to a rare earth permanent magnet material and its preparation method and application. Background technique [0002] Rare earth permanent magnet materials are widely used in electronic products, automobiles, wind power, home appliances, elevators and industrial robots due to their excellent magnetic properties, such as permanent magnet motors such as hard disks, mobile phones, headphones, and elevator traction machines and generators As an energy source, etc., its demand is increasing, and the requirements of various manufacturers for magnet properties such as remanence, coercive force performance, temperature stability, and magnet squareness are gradually increasing. [0003] Rare earth permanent magnet materials are mainly composed of R 2 T 14 The main phase of the B compound and the grain boundary phase located in the grain boundary portion of the main phase are constituted. The R 2 T 14 B compound is a strong ...

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Problems solved by technology

[0006] The present invention aims to overcome that when the rare earth permanent magnet material of the prior art adopts the low B system to improve the magnetic performance, it usually needs to add a large amount of heavy rare earth elements, and even if the heavy rare earth elements are added, the magnetic properties (remanence, coercivity, temperature stability) properties, squareness) still can not be significantly improved defects, but provides a rare earth permanent magnet material and its preparation method and application

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