公开(公告)号：US11996232B2

公开(公告)日：2024-05-28

申请号：US17245641

申请日：2021-04-30

申请人： REGENTS OF THE UNIVERSITY OF MINNESOTA

发明人： Jian-Ping Wang ,  YanFeng Jiang

IPC分类号： H01F1/047 ,  B22D27/02 ,  C22C38/00 ,  H01F1/06 ,  H01F1/08 ,  H01F41/02 ,  H02K1/02

CPC分类号： H01F41/0273 ,  B22D27/02 ,  C22C38/001 ,  H01F1/047 ,  H01F1/06 ,  H01F1/08 ,  H01F41/0266 ,  H02K1/02

摘要： Techniques are disclosed concerning applied magnetic field synthesis and processing of iron nitride magnetic materials. Some methods concern casting a material including iron in the presence of an applied magnetic field to form a workpiece including at least one iron-based phase domain including uniaxial magnetic anisotropy, wherein the applied magnetic field has a strength of at least about 0.01 Tesla (T). Also disclosed are workpieces made by such methods, apparatus for making such workpieces and bulk materials made by such methods.

公开(公告)号：US11830644B2

公开(公告)日：2023-11-28

申请号：US17718517

申请日：2022-04-12

申请人： NIRON MAGNETICS, INC.

发明人： Francis Johnson ,  Richard W. Greger ,  John Michael Larson ,  Yiming Wu ,  Fan Zhang ,  Kathryn Sara Damien

IPC分类号： H01F1/047 ,  H01F1/06 ,  H01F41/02 ,  H01F1/44 ,  H01F1/00

CPC分类号： H01F1/047 ,  H01F1/0045 ,  H01F1/065 ,  H01F1/442 ,  H01F41/0273 ,  C01P2004/64

摘要： Disclosed herein is a permanent magnet comprising: a plurality of aligned iron nitride nanoparticles wherein the iron nitride nanoparticles include α″-Fe16N2 phase domains; wherein a ratio of integrated intensities of an α″-Fe16N2 (004) x-ray diffraction peak to an α″-α″-Fe16N2 (202) x-ray diffraction peak for the aligned iron nitride nanoparticles is greater than at least 7%, wherein the diffraction vector is parallel to alignment direction, and wherein the iron nitride nanoparticles exhibit a squareness measured parallel to the alignment direction that is greater than a squareness measured perpendicular to the alignment direction.

公开(公告)号：US20230374257A1

公开(公告)日：2023-11-23

申请号：US18318924

申请日：2023-05-17

申请人： NICHIA CORPORATION

发明人： Shuichi TADA ,  Takashi ASADA ,  Masahiro ABE

IPC分类号： C08K3/08 ,  C08L63/00 ,  H01F1/059 ,  H01F1/06 ,  C08G59/50

CPC分类号： C08K3/08 ,  C08L63/00 ,  H01F1/059 ,  H01F1/06 ,  C08G59/5033 ,  C08K2201/01 ,  C08K2201/005

摘要： A method, including: preparing at least one magnetic powder having an average particle size that is at least 1 μm but not more than 10 μm, at least one thermosetting resin, and at least one curing agent, wherein at least one of the thermosetting resin and the curing agent includes at least one monomer having a melting point that is higher than 70° C. but not higher than 140° C., and wherein an amount of the monomer having the melting point that is higher than 70° C. but not higher than 140° C. is at least 33% by volume but not more than 100% by volume of a combined amount of the thermosetting resin and the curing agent; and obtaining a magnetic powder-containing resin composition by kneading the magnetic powder, the thermosetting resin, and the curing agent at a temperature of higher than 70° C. but not higher than 140° C. and then lowering the temperature.

公开(公告)号：US11521649B2

公开(公告)日：2022-12-06

申请号：US16330010

申请日：2017-09-27

申请人： SONY CORPORATION

发明人： Atsushi Muramatsu ,  Masafumi Nakaya ,  Masaru Terakawa ,  Satoru Abe ,  Natsuki Toyosawa ,  Katsunori Maeshima

IPC分类号： G11B5/714 ,  C01G49/06 ,  G11B5/65 ,  G11B5/842 ,  H01F1/00 ,  H01F1/06 ,  H01F1/11 ,  G11B5/712 ,  G11B5/706 ,  B82Y25/00 ,  B82Y40/00

摘要： A method of producing a magnetic powder includes: performing heat treatment on first particles that contain triiron tetraoxide to prepare second particles that contain ε-iron oxide.

公开(公告)号：US11511344B2

公开(公告)日：2022-11-29

申请号：US16737156

申请日：2020-01-08

申请人： REGENTS OF THE UNIVERSITY OF MINNESOTA

发明人： Jian-Ping Wang ,  YanFeng Jiang

IPC分类号： C01B21/00 ,  H01F1/08 ,  B22F9/04 ,  C22C33/02 ,  H01F1/06 ,  B22F1/054 ,  C01B21/06 ,  C23C8/26 ,  H01F41/02

摘要： Techniques are disclosed for milling an iron-containing raw material in the presence of a nitrogen source to generate anisotropically shaped particles that include iron nitride and have an aspect ratio of at least 1.4. Techniques for nitridizing an anisotropic particle including iron, and annealing an anisotropic particle including iron nitride to form at least one α″-Fe16N2 phase domain within the anisotropic particle including iron nitride also are disclosed. In addition, techniques for aligning and joining anisotropic particles to form a bulk material including iron nitride, such as a bulk permanent magnet including at least one α″-Fe16N2 phase domain, are described. Milling apparatuses utilizing elongated bars, an electric field, and a magnetic field also are disclosed.

公开(公告)号：US20210335528A1

公开(公告)日：2021-10-28

申请号：US17326609

申请日：2021-05-21

申请人： GREEN WAVE POWER SYSTEMS LLC

发明人： Mark Lawrence Clymer ,  Brenda Lee McConnell

IPC分类号： H01F7/02 ,  F03G3/08 ,  H01F1/00 ,  H01F1/06 ,  H02K7/02

摘要： A system and method for perturbing a permanent magnet asymmetric field to move a body includes a rotating body configured to rotate about a rotation axis, a permanent magnet arrangement arranged on the rotating body containing two or more permanent magnets, and a perturbation element. The permanent magnet arrangement is configured such that an asymmetric magnetic field is generated by the permanent magnets about a perturbation point. Actuation of the perturbation element at or near the perturbation point causes a tangential magnetic force on the rotating body and/or the permanent magnet arrangement, thereby causing the rotating body to rotate about the rotation axis. The disclosure may also be used for linear motion of a body.

公开(公告)号：US20210310534A1

公开(公告)日：2021-10-07

申请号：US17036654

申请日：2020-09-29

申请人： HYUNDAI MOTOR COMPANY ,  KIA MOTORS CORPORATION

发明人： Young Min KIM

IPC分类号： F16F1/36 ,  H01F1/06 ,  H01F41/02

摘要： A coil-integrated magneto-rheological elastomer includes: an elastomer substrate having a predetermined shape and including a magnetic powder; and a coil disposed inside the elastomer substrate. Such a coil-integrated magneto-rheological elastomer can exhibit improved magnetic properties due to the coil embedded in the elastomer substrate.

公开(公告)号：US11090716B2

公开(公告)日：2021-08-17

申请号：US15825469

申请日：2017-11-29

申请人： FUJIFILM Corporation

发明人： Masashi Shirata ,  Takashi Fujimoto

IPC分类号： B22F1/00 ,  G11B5/706 ,  H01F1/06

摘要： Provided is an ε-iron oxide type ferromagnetic powder with a ratio Hc173K/Hc296K between a coercive force Hc173K measured at a temperature of 173 K and a coercive force Hc296K measured at a temperature of 296 K is higher than 1.00 and less than 2.00, and a magnetic recording medium containing the ε-iron oxide type ferromagnetic powder in a magnetic layer.

公开(公告)号：US20210180174A1

公开(公告)日：2021-06-17

申请号：US17182857

申请日：2021-02-23

申请人： Regents of the University of Minnesota ,  UT-BATTELLE, LLC

发明人： Michael P. BRADY ,  Orlando RIOS ,  YanFeng JIANG ,  Gerard M. LUDTKA ,  Craig A. BRIDGES ,  Jian-Ping WANG ,  Xiaowei ZHANG ,  Lawrence F. ALLARD ,  Edgar LARA-CURZIO

IPC分类号： C23C8/26 ,  C21D1/26 ,  C21D6/00 ,  C22C38/00 ,  C23C28/00 ,  C01B21/06 ,  C22C33/00 ,  H01F1/06

摘要： A method may include annealing a material including iron and nitrogen in the presence of an applied magnetic field to form at least one Fe16N2 phase domain. The applied magnetic field may have a strength of at least about 0.2 Tesla (T).

公开(公告)号：US20210125758A1

公开(公告)日：2021-04-29

申请号：US17072203

申请日：2020-10-16

申请人： INOAC CORPORATION ,  NAGOYA INSTITUTE OF TECHNOLOGY

发明人： Nobuyuki MAKIHARA ,  Yasushi IDO ,  Yuhiro IWAMOTO

IPC分类号： H01F1/06 ,  H01F7/06

摘要： An elastic body of this disclosure contains magnetized magnetic powder dispersed in an elastic member, and generates an induced current in a circuit by undergoing an elastic deformation to cause a change in magnetic flux density. The elastic member is an elastomeric foam.