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：US20180218811A1

公开(公告)日：2018-08-02

申请号：US15880859

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

IPC: H01F1/153 ,  H01F1/00 ,  H01F27/255

CPC classification number: H01F1/15325 ,  H01F1/0045 ,  H01F1/15333 ,  H01F27/255 ,  H01F41/0226

Abstract: A soft magnetic alloy comprising a main component having a compositional formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b))MaBb)1−cCc, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, “M” is one or more selected from the group Nb, Hf, Zr, Ta, Mo, W, and V, 0.030≤a≤0.14, 0.005≤b≤0.20, 0≤c≤0.040, α≥0, β≥0, and 0≤α+β≤0.50 are satisfied, when magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10≤P/S≤10.

公开(公告)号：US20180122543A1

公开(公告)日：2018-05-03

申请号：US15794578

申请日：2017-10-26

Applicant: TDK CORPORATION

Inventor： Akihiro HARADA ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Kazuhiro YOSHIDOME ,  Akito HASEGAWA ,  Hajime AMANO ,  Kensuke ARA ,  Masahito KOEDA ,  Seigo TOKORO

IPC: H01F1/153 ,  C22C45/02

Abstract: A soft magnetic alloy including a composition having a formula of ((Fe(1−(α+β))X1αX2β)(1−(a+b+d+e))MaBbCrdCue)1−fCf. X1 is one or more elements selected from a group of Co and Ni. X2 is one or more elements selected from a group of W, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements. M is one or more elements selected from a group of Nb, Hf, Zr, Ta, Ti, Mo, and V. 0.030≤a≤0.14, 0.028≤b≤0.15, 0.005≤d≤0.020, 0

公开(公告)号：US20210062308A1

公开(公告)日：2021-03-04

申请号：US16643981

申请日：2018-05-17

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: C22C38/16 ,  H01F1/153 ,  C22C38/02 ,  C22C38/00 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/08

Abstract: Provided is a soft magnetic alloy having a composition of a compositional formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c+d+e))PaCbSicCudMe. X1 is one or more selected from a group consisting of Co and Ni, X2 is one or more selected from a group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, 0, and rare earth elements, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.050≤a≤0.17, 0

公开(公告)号：US20200303097A1

公开(公告)日：2020-09-24

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：US20190221342A1

公开(公告)日：2019-07-18

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 ,  H01F1/147

CPC classification number: H01F1/15308 ,  C22C38/42 ,  C22C45/02 ,  H01F1/147 ,  H01F1/153 ,  H01F1/15333 ,  H01F41/02 ,  H01F41/0226 ,  H01F41/0246

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：US20210323064A1

公开(公告)日：2021-10-21

申请号：US17363109

申请日：2021-06-30

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.

公开(公告)号：US20190355499A1

公开(公告)日：2019-11-21

申请号：US16415722

申请日：2019-05-17

Applicant: TDK CORPORATION

Inventor： Hideharu MORO ,  Akihiro HARADA ,  Masahito KOEDA

IPC: H01F1/24 ,  B22F1/00 ,  H01F27/255 ,  H01F3/08

Abstract: A dust core includes large particles having an average particle size of 8-15 μm, medium particles having an average particle size of 1-5 μm, and small particles having an average particle size of 300-900 nm when a cross section thereof is observed. An area ratio occupied by the large particles is 50% to 90%, an area ratio occupied by the medium particles is 0% to 30%, and an area ratio occupied by the small particles is 5% to 30%, when a total area ratio occupied by the large particles, the medium particles and the small particles is 100% in the cross section. Vickers hardness (Hv) of the large particles, the medium particles and the small particles is 150-600 respectively. The small particles are alloy powder containing Fe and at least Si or N. The dust core may be included in an inductor element.

公开(公告)号：US20190221341A1

公开(公告)日：2019-07-18

申请号：US16234941

申请日：2018-12-28

Applicant: TDK CORPORATION

Inventor： Kazuhiro YOSHIDOME ,  Akihiro HARADA ,  Hiroyuki MATSUMOTO ,  Kenji HORINO ,  Akito HASEGAWA ,  Kensuke ARA ,  Hajime AMANO ,  Masakazu HOSONO

IPC: H01F1/153 ,  C22C38/00

CPC classification number: H01F1/15325 ,  B22F9/082 ,  B22F2301/355 ,  C22C38/00 ,  C22C38/002 ,  C22C38/005 ,  C22C45/02 ,  C22C2202/02 ,  H01F1/153 ,  H01F1/15308 ,  H01F1/15333 ,  H01F41/02 ,  H01F41/0226 ,  H01F41/0246

Abstract: A soft magnetic alloy includes a main component of (Fe(1-(α+β))X1αX2β)(1-(a+b+c+d+e+f+g))MaBbPcSidCeSfTig. 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：US20180218810A1

公开(公告)日：2018-08-02

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

CPC classification number: H01F1/15308 ,  B22F1/0018 ,  B22F9/082 ,  B22F2009/0828 ,  C22C33/003 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/007 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/32 ,  C22C38/60 ,  C22C45/02 ,  H01F1/15333 ,  H01F27/255 ,  H01F27/2823 ,  H01F41/0226 ,  H01F41/0246 ,  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.