公开(公告)号：US20240112838A1

公开(公告)日：2024-04-04

申请号：US18477949

申请日：2023-09-29

申请人： NICHIA CORPORATION

发明人： Masahiro ABE ,  Shuichi TADA ,  Satoshi YAMANAKA ,  Kenta IWAI

IPC分类号： H01F1/059 ,  B22F1/142 ,  B22F1/145 ,  B22F1/16 ,  H01F1/055

CPC分类号： H01F1/059 ,  B22F1/142 ,  B22F1/145 ,  B22F1/16 ,  H01F1/0551 ,  B22F2201/02 ,  B22F2201/03 ,  B22F2201/11 ,  B22F2201/20 ,  B22F2301/355 ,  B22F2302/45 ,  B22F2998/10

摘要： A method of producing a phosphate-coated SmFeN-based anisotropic magnetic powder, the method including stirring a slurry containing a raw material SmFeN-based anisotropic magnetic powder, water, a phosphate source, and an aluminum source to obtain a SmFeN-based anisotropic magnetic powder having a surface coated with a phosphate.

公开(公告)号：US20220251368A1

公开(公告)日：2022-08-11

申请号：US17629361

申请日：2020-06-17

申请人： NICHIA CORPORATION

发明人： Satoshi YAMANAKA

IPC分类号： C08L63/00 ,  H01F1/059 ,  H01F1/057 ,  H01F41/02

摘要： The present invention provide an additive for bonded magnets which makes it possible to improve the fluidity of a thermoplastic resin-containing bonded magnet compound, the mechanical properties of a bonded magnet, and other properties, as well as methods of producing a bonded magnet compound or bonded magnet with improved such properties. The present invention relates to an additive for thermoplastic resin-containing bonded magnets containing a cured product of a thermosetting resin and a curing agent having a ratio of the number of reactive groups of the curing agent to the number of reactive groups of the thermosetting resin of at least 2 but not higher than 11.

公开(公告)号：US20220157520A1

公开(公告)日：2022-05-19

申请号：US17455155

申请日：2021-11-16

申请人： NICHIA CORPORATION

发明人： Satoshi YAMANAKA ,  Takayuki YANO ,  Shuichi TADA ,  Masahiro ABE ,  Kenta IWAI

IPC分类号： H01F41/02 ,  H01F1/057 ,  B29B7/88 ,  B29C45/00

摘要： A method of producing a compound for bonded magnets, the method including: heat-curing a thermosetting resin and a curing agent having a ratio of the number of reactive groups of the curing agent to the number of reactive groups of the thermosetting resin of at least 2 but not higher than 11 to obtain an additive for bonded magnets; and kneading the additive for bonded magnets, magnetic powder, and a thermoplastic resin to obtain a compound for bonded magnets in which a filling ratio of the magnetic powder is at least 91.5% by mass.

公开(公告)号：US20230415227A1

公开(公告)日：2023-12-28

申请号：US18253676

申请日：2021-09-30

申请人： NICHIA CORPORATION

发明人： Masahiro ABE ,  Satoshi YAMANAKA ,  Shuichi TADA ,  Kenta IWAI

IPC分类号： B22F1/16 ,  H01F1/059 ,  H01F1/055 ,  B22F1/145 ,  B22F1/142 ,  B22F1/103 ,  B22F9/20 ,  B22F3/20 ,  B22F3/22

CPC分类号： B22F1/16 ,  B22F2999/00 ,  H01F1/0551 ,  B22F1/145 ,  B22F1/142 ,  B22F1/103 ,  B22F9/20 ,  B22F3/20 ,  B22F3/225 ,  B22F2301/355 ,  B22F2302/45 ,  B22F2998/10 ,  B22F2201/02 ,  B22F2201/11 ,  B22F2202/05 ,  H01F1/059

摘要： A method for producing a phosphate-coated SmFeN-based anisotropic magnetic powder, the method includes: a phosphate treatment of adding an inorganic acid to a slurry containing an SmFeN-based anisotropic magnetic powder, water, and a phosphate compound to adjust a pH of the slurry to a range from 1 to 4.5 to form an SmFeN-based anisotropic magnetic powder having a surface on which a phosphate coating is formed; and oxidizing by heat treating the SmFeN-based anisotropic magnetic powder having the surface on which the phosphate coating is formed, in an oxygen-containing atmosphere at a temperature in a range of 200° C. to 330° C., to form the phosphate-coated SmFeN-based anisotropic magnetic powder.

公开(公告)号：US20220157500A1

公开(公告)日：2022-05-19

申请号：US17588117

申请日：2022-01-28

申请人： NICHIA CORPORATION

发明人： Shuichi TADA ,  Satoshi YAMANAKA

IPC分类号： H01F1/153 ,  H01F1/053 ,  C08K5/09 ,  C08L71/10 ,  C08L23/12 ,  C08L51/06 ,  H01F1/059

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.

公开(公告)号：US20220103036A1

公开(公告)日：2022-03-31

申请号：US17449023

申请日：2021-09-27

申请人： NICHIA CORPORATION

发明人： Kohei IHARA ,  Masahiro ABE ,  Rie YOSHIDA ,  Satoshi YAMANAKA

IPC分类号： H02K1/27 ,  H02K21/24

摘要： A yoke for a rotor of an axial gap motor, having a plurality of recesses at a surface to be bonded to a bonded magnet, at least one of the recesses penetrating the yoke radially to an inner periphery or an outer periphery, wherein a maximum width of an inside part of at least one of the recesses is larger than that of an open part of the recess.

公开(公告)号：US20200098495A1

公开(公告)日：2020-03-26

申请号：US16582614

申请日：2019-09-25

申请人： NICHIA CORPORATION

发明人： Rieko YOSHIMOTO ,  Satoshi YAMANAKA ,  Shuichi TADA ,  Hideaki YOSHIWARA

IPC分类号： H01F1/055 ,  B05D3/14 ,  B05D7/24 ,  C04B41/00 ,  C04B41/52 ,  C04B41/89 ,  H01F1/059

摘要： Provided are a SmFeN magnetic powder which is superior not only in water resistance and corrosion resistance but also in hot water resistance, and a method of preparing the powder. The present invention relates to a method of preparing a magnetic powder, comprising: plasma-treating a gas; surface-treating a SmFeN magnetic powder with the plasma-treated gas; and forming a coat layer on the surface of the surface-treated SmFeN magnetic powder.

公开(公告)号：US20190224747A1

公开(公告)日：2019-07-25

申请号：US16251956

申请日：2019-01-18

申请人： NICHIA CORPORATION

发明人： Satoshi YAMANAKA ,  Takayuki YANO

IPC分类号： B22F1/00 ,  H01F1/059 ,  H01F1/055

摘要： Included is a method of preparing a compound for bonded magnets, the method including: coating a magnetic material having an average particle size of 10 μm or less with a thermosetting resin and a curing agent at a ratio of the equivalent weight of the curing agent to the equivalent weight of the thermosetting resin of 2 or higher and 10 or lower to obtain a coated material; granulating the coated material by compression to obtain a granulated product; milling the granulated product to obtain a milled product; and surface treating the milled product with a silane coupling agent to obtain a compound for bonded magnets, the method either including, between the granulation and the milling, heat curing the granulated product to obtain a cured product, or including, between the milling and the surface treatment, heat curing the milled product to obtain a cured product.

公开(公告)号：US20190027286A1

公开(公告)日：2019-01-24

申请号：US16040342

申请日：2018-07-19

申请人： NICHIA CORPORATION

发明人： Shuichi TADA ,  Satoshi YAMANAKA

IPC分类号： H01F1/153 ,  H01F1/053 ,  C08L23/12 ,  C08L71/10 ,  C08K5/09

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.

公开(公告)号：US20240006101A1

公开(公告)日：2024-01-04

申请号：US18253534

申请日：2021-09-30

申请人： NICHIA CORPORATION

发明人： Masahiro ABE ,  Satoshi YAMANAKA ,  Shuichi TADA ,  Kenta IWAI ,  Takayuki YANO

IPC分类号： H01F1/059 ,  H01F1/055

CPC分类号： H01F1/059 ,  H01F1/0558 ,  H01F1/0552

摘要： A method for producing a phosphate-coated SmFeN-based anisotropic magnetic powder, the method includes a phosphate treatment of adding an inorganic acid to a slurry containing an SmFeN-based anisotropic magnetic powder, water, and a phosphate compound to adjust a pH of the slurry to a range of 1 to 4.5 to form a phosphate-coated SmFeN-based anisotropic magnetic powder having a surface coated with a phosphate.