A Method for Recovery of Nd2Fe14B Grains from Bulk Sintered Nd-Fe-B Magnets and / or Magnet Scraps by Electrochemical Etching
| Publication Number: | EP3660174A1 |
| Application Date: | 27. 11. 2018 |
| Assignee/Applicant: | Jožef Stefan Institute [SI] |
| Inventor: | Xuan Xu, Sašo Šturm, Kristina Žužek Rožman |
| Title: | A Method for Recovery of Nd2Fe14B Grains from Bulk Sintered Nd-Fe-B Magnets and / or Magnet Scraps by Electrochemical Etching |
| Description: | The invention relates to a method for recovery of Nd2Fe14B grains from bulk sintered Nd-Fe-B magnets and / or magnet scraps. In this method the Nd-Fe-B magnets (1) and / or magnet scraps are anodically oxidized using a non-aqueous liquid electrolyte (5), said anodic oxidation releasing the Nd2Fe14B grains (6) in said Nd-Fe-B magnets (1) and/or magnet scraps. The released Nd2Fe14B grains (6) are collected during and/or after said anodic oxidation. The proposed method allows a more environ- mental friendly and cost-effective way for recycling EOL Nd-Fe-B magnets/ Nd-Fe-B magnet scraps. |
| Drawings: |  |
| Category: | Nanotechnology and New Materials |
| Technology application codes: | Industrial manufacturing, material and transport, Other industrial technologies, Physical and exact sciences, |
| Market application codes: | Industrial products, Other |
| www: | https://worldwide.espacenet.com/patent/search/family/064500217/publication/EP3660174A1?q=EP3660174A1 |
| Patent offices: | EPO |
Extended patent application
| Publication Number: | CN111223657A |
| Application Date: | 17. 11. 2019 |
| Assignee/Applicant: | Jožef Stefan Institute [SI] |
| Inventor: | Sašo Šturm, Xuan Xu, Kristina Žužek Rožman |
| Title: | A Method for Recovery of Nd2Fe14B Grains from Bulk Sintered Nd-Fe-B Magnets And / Or Magnet Scraps by Electrochemical Etching |
| www: | https://worldwide.espacenet.com/patent/search/family/064500217/publication/CN111223657A?q=EP3660174A1 |
Extended patent application
| Publication Number: | JP2020084331A |
| Application Date: | 4. 6. 2020 |
| Assignee/Applicant: | Jožef Stefan Institute [SI] |
| Inventor: | Sašo Šturm, Xuan Xu, Kristina Žužek Rožman |
| Title: | A Method for Recovery of Nd2Fe14B Grains from Bulk Sintered Nd-Fe-B Magnets And / Or Magnet Scraps by Electrochemical Etching |
| www: | https://worldwide.espacenet.com/patent/search/family/064500217/publication/CN111223657A?q=EP3660174A1 |
Extended patent application
| Publication Number: | US2020168395A1 |
| Application Date: | 19. 11. 2019 |
| Assignee/Applicant: | Jožef Stefan Institute [SI] |
| Inventor: | Sašo Šturm, Xuan Xu, Kristina Žužek Rožman |
| Title: | Method for Recovery of Nd2Fe14B Grains from Bulk Sintered Nd-Fe-B Magnets And / Or Magnet Scraps by Electrochemical Etching |
| www: | https://worldwide.espacenet.com/patent/search/family/064500217/publication/US2020168395A1?q=EP3660174A1 |