公开(公告)号：US11798719B2

公开(公告)日：2023-10-24

申请号：US16296348

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Satoko Mori ,  Takuma Nakano ,  Seigo Tokoro ,  Shota Otsuka ,  Toru Ujiie ,  Kentaro Mori

IPC: H01F1/24 ,  H01F1/38 ,  H01F1/33 ,  H01F1/26 ,  H01F3/08 ,  B22F1/16 ,  H01F27/255 ,  H01F41/02 ,  H01F1/153

CPC classification number: H01F1/24 ,  B22F1/16 ,  H01F1/26 ,  H01F1/33 ,  H01F1/38 ,  H01F3/08 ,  B22F2301/35 ,  B22F2304/10 ,  H01F1/15308 ,  H01F1/15333 ,  H01F27/255 ,  H01F41/0246

Abstract: A soft magnetic metal powder having soft magnetic metal particles, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part, a second coating part, and a third coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Si as a main component, the second coating part includes oxides of Fe as a main component, and the third coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.

公开(公告)号：US11158443B2

公开(公告)日：2021-10-26

申请号：US16146268

申请日：2018-09-28

Applicant: TDK CORPORATION

Inventor： Akihiro Harada ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Kazuhiro Yoshidome ,  Akito Hasegawa ,  Hajime Amano ,  Kensuke Ara ,  Seigo Tokoro ,  Masakazu Hosono ,  Takuma Nakano ,  Satoko Mori

IPC: H01F1/147 ,  C22C38/14 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  H01F1/153 ,  C22C38/00

Abstract: A soft magnetic alloy contains a main component having a composition formula of (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d))MaBbPcCd and auxiliary components including at least Ti, Mn and Al. In the composition formula, X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Ag, Zn, Sn, As, Sb, Bi and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V. In the composition formula, 0.030≤a≤0.100, 0.050≤b≤0.150, 0

公开(公告)号：US11763969B2

公开(公告)日：2023-09-19

申请号：US16296626

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Satoko Mori ,  Takuma Nakano ,  Seigo Tokoro ,  Shota Otsuka ,  Toru Ujiie ,  Kentaro Mori

IPC: H01F1/26 ,  H01F1/38 ,  H01F1/33 ,  H01F1/24 ,  H01F3/08 ,  B22F1/16 ,  H01F27/255 ,  H01F41/02 ,  H01F1/153

CPC classification number: H01F1/26 ,  B22F1/16 ,  H01F1/24 ,  H01F1/33 ,  H01F1/38 ,  H01F3/08 ,  B22F2301/35 ,  B22F2304/10 ,  H01F1/15308 ,  H01F1/15333 ,  H01F27/255 ,  H01F41/0246

Abstract: A soft magnetic metal powder having soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part and a second coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Fe as a main component, the second coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn, and a ratio of trivalent Fe atom among Fe atoms of oxides of Fe included in the first coating part is 50% or more.

公开(公告)号：US11887762B2

公开(公告)日：2024-01-30

申请号：US16296367

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Satoko Mori ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Kazuhiro Yoshidome ,  Takuma Nakano ,  Seigo Tokoro ,  Shota Otsuka ,  Toru Ujiie ,  Kentaro Mori

IPC: H01F1/20 ,  H01F1/147 ,  H01F1/36 ,  H01F3/08 ,  H01F1/26 ,  H01F1/33 ,  H01F1/24 ,  H01F1/153 ,  H01F41/02

CPC classification number: H01F1/20 ,  H01F1/14733 ,  H01F1/24 ,  H01F1/26 ,  H01F1/33 ,  H01F1/36 ,  H01F3/08 ,  H01F1/15308 ,  H01F1/15333 ,  H01F41/0246

Abstract: A soft magnetic metal powder comprising soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part having an insulation property, and the coating part includes a soft magnetic metal fine particle.

公开(公告)号：US11152145B2

公开(公告)日：2021-10-19

申请号：US16296394

申请日：2019-03-08

Applicant: TDK CORPORATION

Inventor： Takuma Nakano ,  Kazuhiro Yoshidome ,  Hiroyuki Matsumoto ,  Satoko Mori ,  Seigo Tokoro ,  Kenji Horino

IPC: H01F3/00 ,  H01F1/153 ,  H01F1/147 ,  H01F3/08 ,  H01F1/24 ,  H01F1/33 ,  H01F1/26 ,  H01F41/02

Abstract: Soft magnetic metal powder which includes a plurality of soft magnetic metal particles configured by a Fe-based nanocrystal alloy including Cu is provided, wherein the soft magnetic metal particles have core portions and first shell portions surrounding circumferences of the core portions; when an average crystallite size of Cu crystallites existing in the core portions is set as A, and the largest crystallite size of Cu crystallites existing in the first shell portions is set as B, B/A is 3.0 or more and 1000 or less.

公开(公告)号：US20190279802A1

公开(公告)日：2019-09-12

申请号：US16296626

申请日：2019-03-08

Applicant: TDK Corporation

Inventor： Kazuhiro YOSHIDOME ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Satoko Mori ,  Takuma Nakano ,  Seigo Tokoro ,  Shota Otsuka ,  Toru Ujiie ,  Kentaro Mori

IPC: H01F1/38 ,  B22F1/02

Abstract: A soft magnetic metal powder having soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part and a second coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Fe as a main component, the second coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn, and a ratio of trivalent Fe atom among Fe atoms of oxides of Fe included in the first coating part is 50% or more.