公开(公告)号：US20240133008A1

公开(公告)日：2024-04-25

申请号：US18358154

申请日：2023-07-24

Applicant: SEIKO EPSON CORPORATION

Inventor： Atsushi NAKAMURA ,  Takuma ENOMOTO ,  Kai KITAMURA ,  Junya ABE ,  Masayuki OMOTO

IPC: C22C45/02 ,  H01F1/153 ,  H01F27/255

CPC classification number: C22C45/02 ,  H01F1/1535 ,  H01F27/255 ,  C22C2200/02 ,  C22C2202/02

Abstract: An amorphous alloy soft magnetic powder contains a particle having a composition with a compositional formula (Fe1-xCrx) a (Si1-yBy)100-a-bCb expressed by an atomic ratio, in which 0

公开(公告)号：US20240043975A1

公开(公告)日：2024-02-08

申请号：US18358337

申请日：2023-07-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Atsushi NAKAMURA ,  Takuma ENOMOTO ,  Kai KITAMURA ,  Junya ABE ,  Masayuki OMOTO

IPC: C22C45/02 ,  C22C38/02 ,  B22F1/05 ,  H01F1/147

CPC classification number: C22C45/02 ,  C22C38/02 ,  B22F1/05 ,  H01F1/14766 ,  C22C2200/02 ,  C22C2202/02 ,  B22F2304/10 ,  B22F2301/35

Abstract: An amorphous alloy soft magnetic powder contains a particle having a composition with a compositional formula Fea(Si1-xBx)bCc expressed by an atomic ratio, in which 76.0≤a≤81.0, 16.0≤b≤22.0, 0

公开(公告)号：US20220230789A1

公开(公告)日：2022-07-21

申请号：US17580377

申请日：2022-01-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Takuma ENOMOTO ,  Kai KITAMURA ,  Junya ABE

IPC: H01F1/147 ,  H01F1/153

Abstract: Provided is an amorphous alloy soft magnetic powder having a composition represented by the following formula: (FexCo(1−x))(100−(a+b))(SiyB(1−y)) aMb, [where M is at least one selected from the group consisting of C, S, P, Sn, Mo, Cu, and Nb, 0.73≤x≤0.85, 0.02 ≤y≤0.10, 13.0 ≤a≤19.0, and 0≤b≤2.0], in which a coercive force is 24 [A/m] or more (0.3 [Oe] or more) and 199 [A/m] or less (2.5 [Oe] or less), and a saturation magnetic flux density is 1.60 [T] or more and 2.20 [T] or less.

公开(公告)号：US20190333663A1

公开(公告)日：2019-10-31

申请号：US16395318

申请日：2019-04-26

Applicant: Seiko Epson Corporation

Inventor： Mayu WATANABE ,  Takuma ENOMOTO

IPC: H01F1/153 ,  B22F1/00 ,  C22C38/16 ,  C22C38/12 ,  C22C38/02

Abstract: A soft magnetic powder has a composition represented by FexCuaNbb(Si1-yBy)100-x-a-b [provided that a, b, and x each represent at % and are numbers satisfying 0.3≤a≤2.0, 2.0≤b≤4.0, and 73.0≤x≤79.5, respectively, and y is a number satisfying f(x)≤y

公开(公告)号：US20250010364A1

公开(公告)日：2025-01-09

申请号：US18393822

申请日：2023-12-22

Applicant: SEIKO EPSON CORPORATION

Inventor： Takuma ENOMOTO ,  Junya ABE ,  Kai KITAMURA ,  Hiroyoshi OTAKA

IPC: B22F1/08 ,  B22F1/05 ,  C22C45/02 ,  H01F1/153

Abstract: An amorphous alloy soft magnetic powder contains a particle having a flat shape, has a volume-based average particle diameter of more than 150 μm and 500 μm or less measured by a laser diffraction and scattering particle size distribution analyzer, and has a coercive force of 398 A/m or less, i.e., 5.0 Oe or less. A proportion of particles having a particle diameter of more than 300 μm and 600 μm or less classified by sieving may be 15 mass % or more and 40 mass % or less.

公开(公告)号：US20240229205A9

公开(公告)日：2024-07-11

申请号：US18358154

申请日：2023-07-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Atsushi NAKAMURA ,  Takuma ENOMOTO ,  Kai KITAMURA ,  Junya ABE ,  Masayuki OMOTO

IPC: C22C45/02 ,  H01F1/153 ,  H01F27/255

CPC classification number: C22C45/02 ,  H01F1/1535 ,  H01F27/255 ,  C22C2200/02 ,  C22C2202/02

Abstract: An amorphous alloy soft magnetic powder contains a particle having a composition with a compositional formula (Fe1-xCrx) a (Si1-yBy)100-a-bCb expressed by an atomic ratio, in which 0

公开(公告)号：US20230235436A1

公开(公告)日：2023-07-27

申请号：US18159858

申请日：2023-01-26

Applicant: SEIKO EPSON CORPORATION

Inventor： Mayu WATANABE ,  Takuma ENOMOTO ,  Kai KITAMURA ,  Junya ABE ,  Atsushi NAKAMURA ,  Masayuki OMOTO ,  Ichiro ASAOKA

IPC: C22C45/02 ,  B22F1/065 ,  H01F1/153

CPC classification number: C22C45/02 ,  B22F1/065 ,  H01F1/1535 ,  C22C2202/02

Abstract: An amorphous alloy soft magnetic powder has a composition represented by (FexCo1-x)100-(a+b)(SiyB1-y)aMb, where M is at least one selected from the group consisting of C, S, P, Sn, Mo, Cu, and Nb, and x, y, a, and b satisfy 0.73≤x≤0.85, 0.02≤y≤0.10, 13.0≤a≤19.0, and 0≤b≤2.0. A Si—K absorption edge XANES spectrum obtained when performing an XAFS measurement on particles has a peak A present in a range of 1842±1 eV, a peak B present in a range of 1845±1 eV, and a peak C present in a range of 1848±1 eV. An intensity ratio A/C is 0.40 or less, and an intensity ratio B/C is 0.60 or less.