公开(公告)号：US11869686B2

公开(公告)日：2024-01-09

申请号：US17211304

申请日：2021-03-24

Applicant: TDK CORPORATION

Inventor： Kyotaro Abe ,  Hideharu Moro ,  Toshiaki Kikuchi

IPC: B22F1/054 ,  B22F1/16 ,  H01F1/147 ,  H01F1/33 ,  B82Y40/00 ,  B82Y25/00

CPC classification number: H01F1/33 ,  B22F1/054 ,  B22F1/16 ,  H01F1/147 ,  B22F2301/05 ,  B22F2301/35 ,  B82Y25/00 ,  B82Y40/00

Abstract: The object of the present invention is to provide a fluidizing particle capable of improving a fluidity of a magnetic particle for a magnetic core and capable of improving a permeability of the magnetic core. The fluidizing particle includes a particle body having a magnetic property and a coating layer including a silicon compound covering the particle body, wherein a particle size of the fluidizing particle is 10 to 40 nm, and a circularity of the fluidizing particle is 0.55 or more.