Patents by Inventor CAOHUAN ZHANG

CAOHUAN ZHANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Yttrium-added rare earth permanent magnet material and preparation method therefor
    Patent number: 12129532
    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 (YxRe1-x)aFe100-a-b-cMbBc according 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.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: October 29, 2024
    Assignees: GRIREM ADVANCED MATERIALS CO., LTD., GUOKE RE ADVANCED MATERIALS CO., LTD.
    Inventors: Yang Luo, Dunbo Yu, Jiajun Xie, Caohuan Zhang, Ningtao Quan, Yuanfei Yang, Haijun Peng
  • YTTRIUM-ADDED RARE EARTH PERMANENT MAGNET MATERIAL AND PREPARATION METHOD THEREFOR
    Publication number: 20210156009
    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 (YxRe1-x)aFe100-a-b-cMbBc according 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.
    Type: Application
    Filed: June 20, 2018
    Publication date: May 27, 2021
    Inventors: YANG LUO, DUNBO YU, JIAJUN XIE, CAOHUAN ZHANG, NINGTAO QUAN, YUANFEI YANG, HAIJUN PENG