Preparation method of a rare earth anisotropic bonded magnetic powder
US11987868B2 · kind B2 · utility
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Key dates
| Filing date | Nov 5, 2020 |
| Grant date | May 21, 2024 |
| Priority date | — |
| Expiry date | Jan 12, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/0293
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for preparing a rare earth anisotropic bonded magnetic powder, comprises the following steps: (1) preparing raw powder with RTBH as the main component, wherein, R is Nd or Pr/Nd, and T is a transition metal containing Fe; (2) adding La hydride or Ce hydride and copper powder to the raw powder to form a mixture; (3) subjecting the mixture to atmosphere diffusion heat treatment to give the rare earth anisotropic bonded magnetic powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.