The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2024
Filed:
Jun. 20, 2018
Grirem Advanced Materials Co., Ltd., Beijing, CN;
Guoke Re Advanced Materials Co., Ltd., Langfang, CN;
Yang Luo, Beijing, CN;
Dunbo Yu, Beijing, CN;
Jiajun Xie, Beijing, CN;
Caohuan Zhang, Beijing, CN;
Ningtao Quan, Beijing, CN;
Yuanfei Yang, Beijing, CN;
Haijun Peng, Beijing, CN;
GRIREM ADVANCED MATERIALS CO., LTD., Beijing, CN;
GUOKE RE ADVANCED MATERIALS CO., LTD., Langfang, CN;
Abstract
The present invention discloses an yttrium-added rare earth permanent magnet material and a preparation method therefor. The chemical formula of the material is expressed as (YRe)FeMBaccording to the mass percentage, wherein 0.05≤x≤0.5, 20≤a≤28, 0.5≤b≤2, 0.5≤c≤1.5, Re is Nd and/or Pr, and M is Al and/or Nb. According to the present invention, the relatively surplus and inexpensive rare earths yttrium and cerium are used to replace Nd and/or Pr in NdFeB. By controlling the ratio of the rare earth elements such as yttrium, cerium and neodymium, and adding an appropriate amount of Nb and/or Al element, the rare earth elements are used in a comprehensive and balanced manner while better magnetic properties are maintained.