公开(公告)号：US20240071662A1

公开(公告)日：2024-02-29

申请号：US18455842

申请日：2023-08-25

Applicant: TDK CORPORATION

Inventor： Kyohei TAKAHASHI ,  Hiroshi ITO ,  Isao KANADA

IPC: H01F1/20 ,  B22F1/054 ,  B22F1/145 ,  B22F3/02 ,  B22F9/04 ,  B22F9/30 ,  C22C19/00 ,  C22C19/07

CPC classification number: H01F1/20 ,  B22F1/054 ,  B22F1/147 ,  B22F3/02 ,  B22F9/04 ,  B22F9/30 ,  C22C19/002 ,  C22C19/007 ,  C22C19/07 ,  B22F2201/11 ,  B22F2202/01 ,  B22F2301/15 ,  B22F2304/054 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02

Abstract: The metal magnetic powder includes Co as a main component, and an average particle size (D50) of 1 nm to 100 nm. An X-ray diffraction chart of the metal magnetic powder has a first peak that appears in a range of a diffraction angle 2θ of 41.6±0.3°, and a second peak that appears in a range of a diffraction angle 20θ of 47.4±0.3°. When a full width at half maximum of the first peak is set as FW1, and a full width at half maximum of the second peak is set as FW2, a ratio (FW2/FW1) of FW2 to FW1 is 1 to 5.

公开(公告)号：US20230339018A1

公开(公告)日：2023-10-26

申请号：US18302517

申请日：2023-04-18

Applicant: TDK CORPORATION

Inventor： Kyohei TAKAHASHI ,  Hiroshi ITO ,  Isao KANADA ,  Akito HASEGAWA

IPC: B22F1/102 ,  B22F1/145 ,  B22F1/16 ,  B22F9/24 ,  H01F1/09

CPC classification number: B22F1/102 ,  B22F1/145 ,  B22F1/16 ,  B22F9/24 ,  H01F1/09

Abstract: A metal magnetic powder includes Co as a main component, and the metal magnetic powder includes metal nanoparticles having a mean particle size (D50) of 1 nm or more and 100 nm or less. Each of the metal nanoparticles includes hcp-Co as a main phase, and the metal magnetic powder includes at least one amphoteric metal.

公开(公告)号：US20190304648A1

公开(公告)日：2019-10-03

申请号：US16360269

申请日：2019-03-21

Applicant: TDK Corporation

Inventor： Kyohei TAKAHASHI ,  Isao KANADA

IPC: H01F1/26 ,  H01F1/33 ,  H01F1/34 ,  C22C38/00 ,  B22F1/00 ,  H01F1/147

Abstract: The present invention provides a composite magnetic body comprising metal particles containing Fe or Fe and Co as a main component, a resin, and voids, wherein an average major axis diameter of the metal particles is 30 to 500 nm, an average aspect ratio of the metal particles is 1.5 to 10, and in a cross section of the composite magnetic body, a percent presence of the voids is 0.2 to 10 area % and an average equivalent circle diameter of the voids is 1 μm or less, and a saturation magnetization of the composite magnetic body is 300 to 600 emu/cm3.

公开(公告)号：US20190006095A1

公开(公告)日：2019-01-03

申请号：US16013657

申请日：2018-06-20

Applicant: TDK CORPORATION

Inventor： Akihiro HARADA ,  Yoshihiro SHINKAI ,  Kyohei TAKAHASHI ,  Tomoya HANAI

IPC: H01F27/40 ,  H01F1/33 ,  H01G4/40 ,  H03H7/01 ,  H03H1/00 ,  H01F27/255 ,  H01F27/28

Abstract: A coil component includes a coil and a composite magnetic material containing magnetic particles. The magnetic particles have an average minor-axis length of more than 5.0 nm and 50 nm or less and an average aspect ratio of 2.0 or more and 10.0 or less. The magnetic particles are orientated substantially perpendicularly to a central axis of the coil and are orientated randomly within a perpendicular plane to the central axis of the coil. The composite magnetic material has a saturation magnetization σs of 80.0 emu/g or more.

公开(公告)号：US20240071659A1

公开(公告)日：2024-02-29

申请号：US18455860

申请日：2023-08-25

Applicant: TDK CORPORATION

Inventor： Isao KANADA ,  Hiroshi ITO ,  Kyohei TAKAHASHI

IPC: H01F1/147 ,  B22F1/054 ,  B22F1/10 ,  B22F1/145 ,  B22F3/02 ,  C22C19/07

CPC classification number: H01F1/14733 ,  B22F1/054 ,  B22F1/10 ,  B22F1/147 ,  B22F3/02 ,  C22C19/07 ,  B22F2202/01 ,  B22F2301/15 ,  B22F2304/054 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02

Abstract: A metal magnetic powder includes: metal nanoparticles having an average particle size (D50) is 1 nm to 100 nm, and a main phase of hcp-Co; and an additive elements α including at least one of Fe, Ni, and Cu.

公开(公告)号：US20230343497A1

公开(公告)日：2023-10-26

申请号：US18302270

申请日：2023-04-18

Applicant: TDK CORPORATION

Inventor： Kyohei TAKAHASHI ,  Hiroshi ITO ,  Isao KANADA ,  Kazuhiro YOSHIDOME

IPC: H01F1/08

CPC classification number: H01F1/083 ,  B82Y30/00

Abstract: A metal magnetic powder contains Co as a main component, and the metal magnetic powder includes metal nanoparticles having a mean particle size (D50) of 1 nm or more and 100 nm or less. Each of the metal nanoparticles includes hcp-Co as a main phase, and the metal magnetic powder includes fcc-Co and/or ε-Co as a sub-phase.