A kind of r-t-b magnetic material and preparation method thereof

Abstract

The invention discloses an R-T-B-based magnetic material, which is characterized in that, in terms of weight percentage, it comprises the following components: 27.42wt.% to 33.00wt.% of R; the R is a rare earth element , which contains Pr and R H ; said Pr≥15.00wt.%; said R H Contains Tb and / or Dy; 0.24wt.% to 0.80wt.% Cu; 0.19wt.% to 0.30wt.% Zr; 0wt.% to 1.52wt.% Al; 0.90wt.% to 1.03wt. % B; and, 0.04 wt.% to 0.09 wt.% Ga or 0.28 wt.% to 1.50 wt.% Ga. The magnetic material has better remanence, coercive force, temperature coefficient, etc.

Description

A kind of R-T-B magnetic material and preparation method thereof technical field The present invention relates to a kind of R-T-B magnetic material and preparation method thereof. Background technique [0002] With Nd 2 Fe 14 Neodymium iron boron (NdFeB) magnet material with B as the main component, with high remanence, coercivity and maximum Large magnetic energy product, excellent comprehensive magnetic properties, used in wind power generation, new energy vehicles, variable frequency home appliances, etc. current technology The rare earth component in the NdFeB magnet material is usually dominated by neodymium, with only a small amount of praseodymium. Although there are few existing technologies It has been reported that replacing part of neodymium with praseodymium can improve the performance of magnet materials, but the improvement is limited and still not significant. improvement. On the other hand, the NdFeB magnet material with good coercivity and r...

AI Technical Summary

Problems solved by technology

Although there are a few reports in the prior art that substituting part of praseodymium for neodymium can improve the performance of magnet materials, the degree of improvement is limited and there is still no significant improvement

On the other hand, the NdFeB magnet material with better coercive force and remanent magnetism in the prior art also needs to rely on the addition of a large amount of heavy rare earth elements, and the cost is relatively expensive

Images