公开(公告)号：US20230212722A1

公开(公告)日：2023-07-06

申请号：US17822551

申请日：2022-08-26

Applicant: Murata Manufacturing Co., Ltd. ,  Tohoku Magnet Institute Co., Ltd.

Inventor： Kazuhiro HENMI ,  Tatsuya TOMITA ,  Akira OKUMURA ,  Katsutoshi UJI ,  Toru TAKAHASHI

IPC: C22C38/56 ,  C22C38/02 ,  C22C38/54 ,  C22C38/52 ,  C22C45/02 ,  H01F1/153 ,  H01F1/20 ,  H01F3/08 ,  H01F5/00 ,  B22F1/05

CPC classification number: C22C38/56 ,  C22C38/02 ,  C22C38/54 ,  C22C38/52 ,  C22C45/02 ,  H01F1/153 ,  H01F1/20 ,  H01F3/08 ,  H01F5/00 ,  B22F1/05 ,  B22F2301/35 ,  B22F2304/10

Abstract: An alloy particle contains: total content of Fe and Co: from 82.2 to 96.5 parts by mass; Co: 0 to 30.0 parts by mass; P: 0 to 4.5 parts by mass; B: more than 0 to 5.0 parts by mass; C: 0 to 3.0 parts by mass; Si: 0 to 6.7 parts by mass; Ni: more than 0 to 12.0 parts by mass; Cr: more than 0 to 4.2 parts by mass; total content of Mo, W, Zr, and Nb: 0 to 4.2 parts by mass; total content of P and Cr: 7.4 parts by mass or less; multiplication product of the parts by mass of Ni and Cr: 0.5 or more; and total content of Fe, Co, and Ni: 97.0 parts by mass or less. The alloy particle contains an amorphous phase, and a volume percentage of the amorphous phase is 70% or higher.

公开(公告)号：US20210304946A1

公开(公告)日：2021-09-30

申请号：US17201801

申请日：2021-03-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: H01F27/255 ,  H01F1/147 ,  H01F41/02

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si, wherein the oxide layer has a first oxide layer, a second oxide layer, and a third oxide layer from the alloy particle side. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer where Si content takes a local maximum value, the second oxide layer is a layer where Fe content takes a local maximum value, and the third oxide layer is a layer where Si content takes a local maximum value.

公开(公告)号：US20210183548A1

公开(公告)日：2021-06-17

申请号：US17119622

申请日：2020-12-11

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuya ISHIDA ,  Katsutoshi UJI ,  Hironobu KUBOTA ,  Tomoya OOSHIMA

IPC: H01F1/22 ,  H01F1/147

Abstract: A soft magnetic material for soft magnetic particles with a high filling rate. The soft magnetic material contains first soft magnetic particles and second soft magnetic particles with a larger average particle size than the first soft magnetic particles. The first soft magnetic particles have an average particle size in the range of 0.5 to 10 μm, and the first soft magnetic particles have a nonpolar hydrocarbon group on their surfaces.

公开(公告)号：US20250087403A1

公开(公告)日：2025-03-13

申请号：US18960557

申请日：2024-11-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: H01F27/255 ,  H01F1/147 ,  H01F41/02

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si, wherein the oxide layer has a first oxide layer, a second oxide layer, and a third oxide layer from the alloy particle side. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer where Si content takes a local maximum value, the second oxide layer is a layer where Fe content takes a local maximum value, and the third oxide layer is a layer where Si content takes a local maximum value.

公开(公告)号：US20230343512A1

公开(公告)日：2023-10-26

申请号：US18345907

申请日：2023-06-30

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: H01F41/02 ,  H01F1/147 ,  B22F1/16 ,  B22F1/142

CPC classification number: H01F41/0246 ,  H01F1/14766 ,  B22F1/16 ,  B22F1/142 ,  B22F2302/25 ,  B22F2301/35 ,  Y10T428/12181 ,  B22F1/145

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si. The oxide layer has a first oxide layer, a second oxide layer, and a third oxide layer from a side of the alloy particle. All of the first oxide layer, the second oxide layer, and the third oxide layer contain Si. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer having Fe content smaller than Si content in the alloy particle, the second oxide layer is a layer having Fe content larger than the Si content in the alloy particle, and the third oxide layer is a layer having Fe content smaller than the Si content in the alloy particle.

公开(公告)号：US20210304931A1

公开(公告)日：2021-09-30

申请号：US17213121

申请日：2021-03-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: H01F1/147 ,  B22F1/02 ,  B22F1/00

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si. The oxide layer has a first oxide layer, a second oxide layer, and a third oxide layer from a side of the alloy particle. All of the first oxide layer, the second oxide layer, and the third oxide layer contain Si. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer having Fe content smaller than Si content in the alloy particle, the second oxide layer is a layer having Fe content larger than the Si content in the alloy particle, and the third oxide layer is a layer having Fe content smaller than the Si content in the alloy particle.

公开(公告)号：US20240191328A1

公开(公告)日：2024-06-13

申请号：US18583595

申请日：2024-02-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: C22C38/02 ,  B22F1/107 ,  B22F1/145 ,  B22F1/16 ,  B22F3/02 ,  H01F1/147 ,  H01F1/24 ,  H01F27/255

CPC classification number: C22C38/02 ,  B22F1/145 ,  B22F1/16 ,  B22F3/02 ,  H01F1/14766 ,  H01F1/24 ,  B22F1/107 ,  B22F2301/35 ,  B22F2302/256 ,  C22C2202/02 ,  H01F27/255 ,  Y10T428/12181

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si. The oxide layer has a first oxide layer, a second oxide layer, a third oxide layer, and a fourth oxide layer. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer where Fe content takes a local maximum value, the second oxide layer is a layer where Fe content takes a local maximum value, the third oxide layer is a layer where Si content takes a local maximum value, and the fourth oxide layer is a layer where Fe content takes a local maximum value.

公开(公告)号：US20230093061A1

公开(公告)日：2023-03-23

申请号：US17759245

申请日：2021-01-14

Applicant: Murata Manufacturing Co., Ltd. ,  ALPS ALPINE CO., LTD.

Inventor： Katsutoshi UJI ,  Tatsuya TOMITA ,  Kenji YOSHIDA

IPC: C22C45/02 ,  C22C38/54 ,  C22C33/00 ,  C22C38/42 ,  C22C38/52 ,  C22C38/02

Abstract: An alloy includes: an average Ni concentration of 1.5 at.% or more and 15.5 at.% or less; an average Co concentration of 0 at.% or more and 10.0 at.% or less; an average B concentration of 3.0 at.% or more and 16.0 at.% or less; an average P concentration of 0.5 at.% or more and 10.0 at.% or less; an average Cu concentration of 0 at.% or more and 2.0 at.% or less; an average Si concentration of 0 at.% or more and 6.0 at.% or less; an average C concentration of 0 at.% or more and 6.0 at.% or less; a total of average concentrations of Nb, Mo, Zr, W, V, Hf, Ta, Al, Ti, and Cr of 0 at.% or more and 6.0 at.% or less; and a total of an average Fe concentration, the average Ni concentration, and the average Co concentration of 78.0 at.% or more and 88.0 at.% or less.

公开(公告)号：US20210313100A1

公开(公告)日：2021-10-07

申请号：US17201871

申请日：2021-03-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: H01F1/147 ,  B22F1/02 ,  B22F3/02 ,  C22C38/02

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si. The oxide layer has a first oxide layer, a second oxide layer, a third oxide layer, and a fourth oxide layer. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer where Fe content takes a local maximum value, the second oxide layer is a layer where Fe content takes a local maximum value, the third oxide layer is a layer where Si content takes a local maximum value, and the fourth oxide layer is a layer where Fe content takes a local maximum value.