公开(公告)号：US10854376B2

公开(公告)日：2020-12-01

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 ,  H01F27/28 ,  H01F27/255 ,  H01F17/00 ,  H01F27/29 ,  H01G4/30 ,  H01G4/248

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：US10535455B2

公开(公告)日：2020-01-14

申请号：US15880920

申请日：2018-01-26

Applicant: TDK CORPORATION

Inventor： Akihiro Harada ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Kazuhiro Yoshidome ,  Akito Hasegawa ,  Hajime Amano ,  Kensuke Ara ,  Seigo Tokoro ,  Shota Otsuka

IPC: H01F27/255 ,  H01F1/153 ,  H01F27/28 ,  H01F41/02 ,  H01F41/06

Abstract: A soft magnetic alloy including a main component having a compositional formula of (Fe(1−(α+β))X1αX2β)(1−(a+b+c))MaBbPc, and a sub component including at least C, S and Ti, wherein X1 is one or more selected from the group including Co and Ni, X2 is one or more selected from the group including Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, “M” is one or more selected from the group including Nb, Hf, Zr, Ta, Mo, W, and V, 0.020≤a≤0.14, 0.020≤b≤0.20, 0≤c≤0.040, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied, when entire said soft magnetic alloy is 100 wt %, a content of said C is 0.001 to 0.050 wt %, a content of said S is 0.001 to 0.050 wt %, and a content of said Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing the content of said C by the content of said S is C/S, then C/S satisfies 0.10≤C/S≤10.

公开(公告)号：US11972884B2

公开(公告)日：2024-04-30

申请号：US16244633

申请日：2019-01-10

Applicant: TDK CORPORATION

Inventor： Kazuhiro Yoshidome ,  Akihiro Harada ,  Hiroyuki Matsumoto ,  Kenji Horino ,  Akito Hasegawa ,  Kensuke Ara ,  Hajime Amano ,  Masakazu Hosono

IPC: H01F1/153 ,  C22C38/42 ,  C22C45/02 ,  H01F1/147 ,  H01F41/02

CPC classification number: H01F1/15325 ,  H01F1/14741 ,  H01F1/15308 ,  H01F1/15333 ,  H01F41/0226 ,  H01F41/0246 ,  C22C38/42 ,  C22C45/02

Abstract: A soft magnetic alloy includes a main component of (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))MaBbPcSidCe. X1 is one or more of Co and Ni. X2 is one or more of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O, and rare earth elements. M is one or more of Nb, Hf, Zr, Ta, Mo, W, and V. 0.020≤a≤0.14 is satisfied. 0.020

公开(公告)号：US11495377B2

公开(公告)日：2022-11-08

申请号：US16971338

申请日：2019-02-15

Applicant: TDK CORPORATION

Inventor： Hajime Amano ,  Akihiro Harada ,  Kenji Horino ,  Hiroyuki Matsumoto ,  Kazuhiro Yoshidome ,  Akito Hasegawa ,  Kensuke Ara ,  Masakazu Hosono

IPC: H01F1/153 ,  C22C45/00

Abstract: Provided is a soft magnetic alloy which has high saturation flux density and low coercivity and is represented by the compositional formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e+f))MaPbSicCudX3eBf, wherein X1 is at least one element selected from the group consisting of Co and Ni, X2 is at least one element selected from the group consisting of Ti, V, Mn, Ag, Zn, Al, Sn, As, Sb, Bi, and rare earth elements, X3 is at least one element selected from the group consisting of C and Ge, and M is at least one element selected from the group consisting of Zr, Nb, Hf, Ta, Mo, and W, and wherein 0.030≤a≤0.120, 0.010≤b≤0.150, 0≤c≤0.050, 0≤d≤0.020, 0≤e≤0.100, 0≤f≤0.030, α≥0, β≥0, and 0≤α+β≤0.55.

公开(公告)号：US11244778B2

公开(公告)日：2022-02-08

申请号：US16822772

申请日：2020-03-18

Applicant: TDK CORPORATION

Inventor： Makoto Iwasaki ,  Akihiro Harada

IPC: H01F1/057 ,  C22C30/02

Abstract: An R-T-B based permanent magnet wherein R is one or more rare earth elements, T is Fe and Co, and B is boron. The R-T-B based permanent magnet includes M, C and N, wherein M is two or more selected from Cu, Ga, Mn, Zr, and Al, and includes at least Cu and Ga. A total content of R is ≥29.0 and ≤33.5 mass %, Co content is ≥0.10 and ≤0.49 mass %, B content is ≥0.80 and ≤0.96 mass %, a total content of M is ≥0.63 and ≤4.00 mass %, Cu content is ≥0.51 and ≤0.97 mass %, Ga content is ≥0.12 and ≤1.07 mass %, C content is ≥0.065 and ≤0.200 mass %, N content is ≥0.023 and ≤0.323 mass %, and Fe is a substantial balance.

公开(公告)号：US11084094B1

公开(公告)日：2021-08-10

申请号：US16030993

申请日：2018-07-10

Applicant: TDK CORPORATION

Inventor： Kenji Horino ,  Kazuhiro Yoshidome ,  Akihiro Harada ,  Hiroyuki Matsumoto

IPC: B22F9/08

Abstract: A metal powder producing apparatus comprising a melted metal supplying part discharging a melted metal, a cylinder body provided below the melted metal supplying part, and a cooling liquid layer forming part forming a flow of a cooling liquid for cooling the melted metal discharged from the melted metal supplying part along an inner circumference face of the cylinder body, wherein the cooling liquid layer forming part has a primary pressure reservoir, and the primary pressure reservoir is provided on an outer circumference part of the cylinder body.