Patents by Inventor LIBAI SUN

LIBAI SUN 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).

  • Micro powder for preparing neodymium-iron-boron permanent magnet material, method for preparing powder by target-type jet milling, and powder
    Patent number: 11571744
    Abstract: The current invention discloses a type of micronized powder for manufacturing sintered Neodymium magnetic material, a target type jet mill pulverization method to prepare the micronized powder, and the resulting pulverized powder. The Neodymium magnet powder created under the method is of sphericity of greater than or equal to 90% and of particle adhesion rate of less than or equal to 10%. A is the diameter of the target center, B is the diameter of the side nozzle, and C is the distance between the target center and the nozzle. The relationship amongst A, B and C is A/B=m×(C/A+B), where m ranges from 1 to 7. A velocity of the jet stream from side nozzle is between about 320 m/s to about 580 m/s.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: February 7, 2023
    Assignees: SANVAC (BEIJING) MAGNETICS CO., LTD., BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD.
    Inventors: Guoan Chen, Bin Fang, Libai Sun, Yugang Zhao
  • MICRO POWDER FOR PREPARING NEODYMIUM-IRON-BORON PERMANENT MAGNET MATERIAL, METHOD FOR PREPARING POWDER BY TARGET-TYPE JET MILLING, AND POWDER
    Publication number: 20200030884
    Abstract: The current invention discloses a type of micronized powder for manufacturing sintered Neodymium magnetic material, a target type jet mill pulverization method to prepare the micronized powder, and the resulting pulverized powder. The Neodymium magnet powder created under the method is of sphericity of greater than or equal to 90% and of particle adhesion rate of less than or equal to 10%. A is the diameter of the target center, B is the diameter of the side nozzle, and C is the distance between the target center and the nozzle. The relationship amongst A, B and C is A/B=m×(C/A+B), where m ranges from 1 to 7. A velocity of the jet stream from side nozzle is between about 320 m/s to about 580 m/s.
    Type: Application
    Filed: June 21, 2019
    Publication date: January 30, 2020
    Applicants: SANVAC (BEIJING) MAGNETICS CO., LTD., BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD.
    Inventors: GUOAN CHEN, BIN FANG, LIBAI SUN, YUGANG ZHAO