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公开(公告)号：US11990259B2
公开(公告)日：2024-05-21
申请号：US18013072
申请日：2021-03-31
CPC分类号： H01F1/0551 , B22F1/05 , B22F1/10 , C08K9/02 , C22C38/001 , C22C38/005 , B22F2301/355 , B22F2304/10 , C08K2201/005 , C08K2201/01
摘要： A rare earth-iron-nitrogen-based magnetic powder according to this invention contains, as main constituent components, a rare-earth element (R), iron (Fe), and nitrogen (N). Moreover, this magnetic powder has an average particle size of 1.0-10.0 μm, and contains 22.0-30.0 mass % of a rare-earth element (R) and 2.5-4.0 mass % of nitrogen (N). Further, this magnetic powder includes: a core part having any one crystal structure among a Th2Zn17 type, a Th2Ni17 type, and a TbCu7 type; and a shell layer provided on the surface of the core part and having a thickness of 1-30 nm. The shell layer contains a rare-earth element (R) and iron (Fe) so that the R/Fe atomic ratio is 0.3-5.0, and further contains 0-10 at % (exclusive of 0) of nitrogen (N). Furthermore, this magnetic powder contains compound particles composed of a rare-earth element (R) and phosphorus (P).
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公开(公告)号：US20240145135A1
公开(公告)日：2024-05-02
申请号：US18276106
申请日：2021-12-22
发明人： Johannes MAURATH , Simone SCHUSTER
CPC分类号： H01F1/0551 , H01F1/0536 , H01F1/0557 , H01F1/0577 , H01F41/0266
摘要： A method for manufacturing a raw magnet includes manufacturing a first raw form from a first magnetic base material; manufacturing a second raw form from a second magnetic base material; and applying an external magnetic field to at least one raw form selected from a group consisting of the first raw form and the second raw form during and/or after manufacturing of the raw form. A third raw form is manufactured from the first raw form and the second raw form by joining them together. The third raw form is sintered and the raw magnet is obtained.
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3.发明公开公开(公告)号：US20240112854A1
公开(公告)日：2024-04-04
申请号：US18476691
申请日：2023-09-28
申请人： PROTERIAL, LTD.
IPC分类号： H01F41/00 , B22F1/05 , B22F3/16 , B22F9/04 , C22C38/00 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F1/053
CPC分类号： H01F41/00 , B22F1/05 , B22F3/16 , B22F9/04 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F1/0536 , B22F2009/044 , B22F2201/20 , B22F2202/05 , B22F2301/355 , B22F2304/10 , B22F2998/10 , B22F2999/00
摘要： A method for recycling a rare earth element-containing powder, including:
disintegrating a molded body for a rare earth sintered magnet including a rare earth element-containing powder in oil such that a 149 mesh-pass, 500 mesh-on powder is included; and
separating and collecting a 149 mesh-pass powder obtained after the disintegrating to obtain a recycles powder.-
公开(公告)号：US11894719B2
公开(公告)日：2024-02-06
申请号：US17016863
申请日：2020-09-10
发明人： Chuanbing Rong
摘要： A rotor of an electric machine includes a rotor core defining a magnet channel extending axially between opposing ends of the rotor core. A permanent magnet is disposed in the channel and has opposing ends and opposing major sides. The magnet includes a central piece of anisotropic magnetic material having a first magnetically easy crystallographic axis, and a corner piece of anisotropic magnetic material joined to the central piece and having a second magnetically easy crystallographic axis that is oblique to the first easy axis.
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公开(公告)号：US11862372B2
公开(公告)日：2024-01-02
申请号：US17588117
申请日：2022-01-28
申请人： NICHIA CORPORATION
发明人： Shuichi Tada , Satoshi Yamanaka
CPC分类号： H01F1/15375 , C08K5/09 , C08L23/12 , C08L51/06 , C08L71/10 , H01F1/053 , H01F1/059 , C08K2201/01 , C08L51/06 , C08K3/10 , C08L23/12
摘要： The present invention relates to a composition for bonded magnets having good hot water resistance and a method of manufacturing the composition. The method of manufacturing a composition for bonded magnets includes: obtaining a first kneaded mixture by kneading a rare earth-iron-nitrogen-based magnetic powder and an acid-modified polypropylene resin; and obtaining a second kneaded mixture by kneading the first kneaded mixture with a polypropylene resin and an amorphous resin having a glass transition temperature of 120° C. or higher and 250° C. or lower, wherein, with respect to 100 parts by weight of the rare earth-iron-nitrogen-based magnetic powder, the amount of the acid-modified polypropylene resin is 3.5 parts by weight or greater and less than 10.4 parts by weight, and the total amount of the polypropylene resin and the amorphous resin is 0.35 part by weight or greater and less than 3.88 parts by weight.
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公开(公告)号：US20230352220A1
公开(公告)日：2023-11-02
申请号：US18127338
申请日：2023-03-28
发明人： Hiroshi BABA , Hiroki IIDA , Mikio YOSHIDA , Koichi HIROTA
CPC分类号： H01F1/0536 , H01F1/0556
摘要： In a sintered rare-earth magnet containing R2T14B main-phase grains (R being one or more element selected from rare-earth elements and T being one or more element selected from iron group elements), intergranular grain boundaries that from between two mutually adjoining main-phase grains and grain boundary triple junctions surrounded by three or more main-phase grains, the main-phase grains, the intergranular grain boundaries and the grain boundary triple junctions all include TiB2 crystals. The sintered rare-earth magnet is a to high-performance magnet of high coercivity and good squareness.
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公开(公告)号：US11798716B2
公开(公告)日：2023-10-24
申请号：US16592240
申请日：2019-10-03
发明人： Tetsuya Ohashi , Hiroki Iida , Koichi Hirota , Hajime Nakamura , Mikio Yoshida , Kazuya Fukui , Michihiro Oida
CPC分类号： H01F1/0536 , H01F1/0572 , H01F1/0577
摘要： Provided is a rare earth sintered magnet in which a multi-layer main phase particle having multiple layers including a layer 1 having R2 concentration, represented by at %, higher than that of a center of the particle, a layer 2 which is formed on the outside of the layer 1 and has R2 concentration lower than that of the layer 1, and a layer 3 which is formed on the outside of the layer 2 and has R2 concentration higher than that of the layer 2 is present at least in a portion in the vicinity of a surface of the main phase particle within at least 500 μm from a surface of the sintered magnet body.
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8.发明授权公开(公告)号：US11646154B2
公开(公告)日：2023-05-09
申请号：US17303571
申请日：2021-06-02
申请人： NICHIA CORPORATION
发明人： Rie Yoshida , Masahiro Abe , Michiya Kume , Kohei Ihara , Shuichi Tada
IPC分类号： H01F1/053 , H01F7/02 , H01F1/059 , C08L77/02 , H01F41/02 , B29C45/00 , H01F1/08 , H01F1/113 , B29K77/00 , B29K683/00 , B29K505/12 , B29K105/16 , B29K105/00 , B29C45/14 , B22F7/08 , B22F3/22
CPC分类号： H01F1/0533 , B29C45/0013 , C08L77/02 , H01F1/059 , H01F1/083 , H01F1/113 , H01F7/02 , H01F41/0266 , B22F3/225 , B22F7/08 , B22F2998/10 , B29C45/1459 , B29K2077/00 , B29K2105/0044 , B29K2105/16 , B29K2505/12 , B29K2683/00 , B29K2995/0008 , B22F2998/10 , B22F1/10 , B22F3/225
摘要： The present invention relates to a composite component including a metal component having a substantially cylindrical shape or a substantially annular shape, and a ring-shaped bonded magnet disposed on the outer periphery of the metal component, the ring-shaped bonded magnet containing a thermoplastic resin, magnetic particles, and rubber particles.
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公开(公告)号：US20220406497A1
公开(公告)日：2022-12-22
申请号：US17873213
申请日：2022-07-26
摘要： A sintered R2M17 magnet is provided that comprises at least 70 Vol % of a Sm2M17 phase, wherein R is at least one of the group consisting of Ce, La, Nd, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm,
Yt, Lu and Y, and M comprises Co, Fe, Cu and Zr. In an area of the R2M17 sintered magnet of 200 by 200 μm viewed in a Kerr micrograph, an areal proportion of demagnetised regions after application of an internal opposing field of 1200 kA/m is less than 5% or less than 2%.-
公开(公告)号：US11456095B2
公开(公告)日：2022-09-27
申请号：US16865982
申请日：2020-05-04
摘要： A sintered R2M17 magnet is provided that comprises at least 70 Vol % of a Sm2M17 phase, wherein R is at least one of the group consisting of Ce, La, Nd, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yt, Lu and Y, and M comprises Co, Fe, Cu and Zr. In an area of the R2M17 sintered magnet of 200 by 200 μm viewed in a Kerr micrograph, an areal proportion of demagnetised regions after application of an internal opposing field of 1200 kA/m is less than 5% or less than 2%.
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