High-cu and high-al neodymium iron boron magnet and preparation method therefor
US12416070B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2020 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Aug 1, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0573
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high-Cu and high-Al neodymium iron boron magnet and a preparation method therefor. The high-Cu and high-Al neodymium iron boron magnet comprises: 29.5-33.5% R, over 0.985% B, over 0.50% Al, over 0.35% Cu, over 1% RH, and 0.1-0.4% high-melting-point elements N and Fe, wherein the percentages are the mass percentages of the elements in the total amount of elements, and the mass percentages of the element contents must satisfy the following relationships: (1) 1<RH<0.11R<3.54B; and (2) 0.12RH<Al. By means of combining Al, RH and high-melting-point metal elements that are added at a certain ratio, the problem in which the strength of a high-Cu magnet is insufficient is effectively solved, while the magnetic performance is the magnet material is ensured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.