Method of Forming a Starting Material for Producing Rare Earth Permanent Magnets from Recycled Materials and Corresponding Starting Material
| Publication Number: |
EP4066963A1 |
| Application Date: |
29. 3. 2021 |
| Assignee/Applicant: |
Jožef Stefan Institute [SI] |
| Inventor: |
Zuzek Rozman Kristina; Sturm Saso |
| Title: |
Method of Formig a Starting Material for Producing Rare Earth Permanent Magnets from Recycled Materials and Corresponding Starting Material |
| Description: |
The present invention relates to a method of forming a starting material for producing rare earth permanent magnets from recycled materials. The method comprises at least the steps of providing single Nd2Fe14B grains of end-of-life Nd2Fe14B magnets and/or magnet scraps and coating the grains with a single layer or with a layer sequence of one or several grain boundary materials such that said single layer or layer sequence is covering each individual grain. The grain boundary material of said single layer or of a lowermost layer of said layer sequence is selected from one or several metals or metal compounds or alloys. The coated grains are then condensed to bulk Nd-Fe-B permanent magnets, optionally via subsequent thermal treatments. |
| Drawings: |
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| Category: |
Nanotechnology and New Materials |
| Technology application codes: |
Physical and exact sciences |
| Market application codes: |
Other electronics related, Industrial products |
| www: |
https://worldwide.espacenet.com/patent/search/family/075277823/publication/EP4066963A1?q=pn%3DEP4066963A1 |
| Patent offices: |
WIPO |
