公开(公告)号：US11952286B2

公开(公告)日：2024-04-09

申请号：US16967197

申请日：2019-02-06

Applicant: POWDERTECH CO., LTD.

Inventor： Koji Aga ,  Takashi Kojima ,  Kazutaka Ishii ,  Tetsuya Igarashi ,  Sho Kuwahara

IPC: C01G49/00 ,  C08K3/22 ,  C08L29/04 ,  H01F1/34 ,  H01F1/37 ,  H05K9/00

CPC classification number: C01G49/0072 ,  C08L29/04 ,  H01F1/344 ,  H01F1/37 ,  H05K9/0081 ,  C01P2004/32 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C08K3/22 ,  C08K2201/005 ,  C08K2201/006 ,  C08K2201/01

Abstract: Provided are: an Mn ferrite powder characterized by including a plurality of ferrite particles, having a volume-average particle diameter of 1-10 μm, and having a 2.106 μm volume-based cumulative distribution (sieved) of 0.1-50.0 vol %; and a resin composition characterized by including said powder and a resin material.

公开(公告)号：US12119151B2

公开(公告)日：2024-10-15

申请号：US17795382

申请日：2021-01-27

Applicant: POWDERTECH CO., LTD.

Inventor： Koji Aga ,  Takashi Kojima ,  Takao Sugiura ,  Sho Kuwahara ,  Satomi Konno ,  Tadashi Tsuduki

IPC: H01F1/34 ,  C01G49/00

CPC classification number: H01F1/344 ,  C01G49/0072 ,  C01P2002/50 ,  C01P2004/32 ,  C01P2004/61 ,  C01P2006/40 ,  C01P2006/42 ,  C01P2006/80

Abstract: Provided are a ferrite powder capable of maintaining a high withstand voltage even when used in a resin composition having high magnetic properties and electrical resistivity and a high filling ratio, and a method for producing the same. A ferrite powder composed of spherical ferrite particles, wherein the ferrite powder contains iron (Fe): 55.0-70.0 mass % and manganese (Mn): 3.5-18.5 mass %, the ferrite powder containing more than 0.0 mass % to 7.5 mass % α-Fe2O3, and the ferrite powder has a volume average particle size (D50) of 15.0 μm or less.