公开(公告)号：US11014826B2

公开(公告)日：2021-05-25

申请号：US16082102

申请日：2017-02-22

Applicant: POWDERTECH CO., LTD.

Inventor： Takashi Kojima ,  Kazutaka Ishii ,  Takao Sugiura ,  Tetsuya Igarashi ,  Koji Aga

IPC: H01F1/36 ,  H01F1/37 ,  H01F1/375 ,  C01G49/00 ,  C08K3/22 ,  C08L101/00 ,  C30B29/22 ,  C08K7/18 ,  H05K1/02 ,  H05K1/03

Abstract: An object of the present invention is to provide ferrite particles having a high saturation magnetisation, and being excellent in the dispersibility in a resin, a solvent or a resin composition, a resin composition including the ferrite particles, and a resin film composed of the resin composition. The ferrite particles are a single crystalline body having an average particle size of 1 to 2000 nm, and Mn-based ferrite particles having a spherical shape, and have a saturation magnetisation of 45 to 95 Am2/kg. The resin composition includes the ferrite particles as a filler. The resin film is composed of the resin composition.