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公开(公告)号：US20240006101A1
公开(公告)日：2024-01-04
申请号：US18253534
申请日：2021-09-30
Applicant: NICHIA CORPORATION
Inventor： Masahiro ABE , Satoshi YAMANAKA , Shuichi TADA , Kenta IWAI , Takayuki YANO
CPC classification number: H01F1/059 , H01F1/0558 , H01F1/0552
Abstract: 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.
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2.发明申请公开(公告)号：US20180315526A1
公开(公告)日：2018-11-01
申请号：US15965300
申请日：2018-04-27
Applicant: NICHIA CORPORATION
Inventor： Rie YOSHIDA , Masahiro ABE , Michiya KUME , Kohei IHARA , Shuichi TADA
CPC classification number: H01F1/083 , B22F1/0059 , H01F1/113 , H01F41/0266
Abstract: 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：US20250014791A1
公开(公告)日：2025-01-09
申请号：US18712397
申请日：2022-11-09
Applicant: NICHIA CORPORATION
Inventor： Jun AKAMATSU , Satoshi ABE , Masahiro ABE , Kenta IWAI , Satoshi YAMANAKA , Shuichi TADA , Nobuyoshi IMAOKA
Abstract: A method of producing a magnetic powder includes performing a phosphorus treatment to obtain a phosphorus compound and a rare earth-iron-nitrogen-based magnetic powder, the phosphorus treatment including adding an inorganic acid to a slurry containing: a rare earth-iron-nitrogen-based magnetic powder containing R, Fe, and N, where R represents at least one of rare earth elements selected from the group consisting of Y, Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Lu, and Sm, and if R contains Sm, Sm constitutes less than 50 atm % of a total R atomic content; water; and a phosphorus-containing substance.
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公开(公告)号：US20240047112A1
公开(公告)日：2024-02-08
申请号：US18366601
申请日：2023-08-07
Applicant: NICHIA CORPORATION
Inventor： Rie YOSHIDA , Daichi ITAMI , Masahiro ABE , Kuniyasu KAWAMURA , Takayuki YANO , Muneo YAMAMOTO
Abstract: A cylindrical multipole magnet having an inner peripheral surface and an outer peripheral surface and having N- and S-poles alternately and continuously in a circumferential direction. A surface magnetic flux density of the outer peripheral surface is at least 0.2 times a surface magnetic flux density of the inner peripheral surface. The cylindrical multipole magnet contains an anisotropic rare earth magnetic powder and a resin, with a filling ratio of the anisotropic rare earth magnetic powder being at least 50 vol % but not higher than 65 vol % with respect to a total volume of the anisotropic rare earth magnetic powder and the resin.
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公开(公告)号：US20220157520A1
公开(公告)日：2022-05-19
申请号：US17455155
申请日：2021-11-16
Applicant: NICHIA CORPORATION
Inventor： Satoshi YAMANAKA , Takayuki YANO , Shuichi TADA , Masahiro ABE , Kenta IWAI
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20250149240A1
公开(公告)日：2025-05-08
申请号：US19013488
申请日：2025-01-08
Applicant: NICHIA CORPORATION
Inventor： Satoshi YAMANAKA , Takayuki YANO , Shuichi TADA , Masahiro ABE , Kenta IWAI
Abstract: 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.
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公开(公告)号：US20240112838A1
公开(公告)日：2024-04-04
申请号：US18477949
申请日：2023-09-29
Applicant: NICHIA CORPORATION
Inventor： Masahiro ABE , Shuichi TADA , Satoshi YAMANAKA , Kenta IWAI
CPC classification number: H01F1/059 , B22F1/142 , B22F1/145 , B22F1/16 , H01F1/0551 , B22F2201/02 , B22F2201/03 , B22F2201/11 , B22F2201/20 , B22F2301/355 , B22F2302/45 , B22F2998/10
Abstract: 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.
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公开(公告)号：US20240344203A1
公开(公告)日：2024-10-17
申请号：US18633804
申请日：2024-04-12
Applicant: NICHIA CORPORATION
Inventor： Satoshi ABE , Ryoya OKAZAKI , Jun AKAMATSU , Nobuyoshi IMAOKA , Masahiro ABE
CPC classification number: C23C22/07 , B22F1/16 , B22F1/17 , B22F3/16 , C23C22/82 , H01F1/053 , H01F41/0266 , B22F2301/35 , B22F2998/10
Abstract: A method of producing a coated magnetic material, including: a coating procedure including mixing a soft magnetic material and an aqueous solution containing a phosphate compound and a rare earth compound to form a coating containing a phosphorus compound containing a rare earth metal element on a surface of the soft magnetic material.
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公开(公告)号：US20230386710A1
公开(公告)日：2023-11-30
申请号：US18324341
申请日：2023-05-26
Applicant: NICHIA CORPORATION
Inventor： Jun AKAMATSU , Satoshi ABE , Nobuyoshi IMAOKA , Masahiro ABE
CPC classification number: H01F1/0551 , H01F41/0253 , B22F1/145 , B22F1/142 , B22F1/16 , B22F2999/00 , B22F2301/355 , B22F2302/45 , B22F2998/10 , B22F2201/03
Abstract: A coated rare earth-iron-nitrogen-based magnetic powder including: a core region; a first coating portion provided outside the core region; and a second coating portion, the core region containing R, Fe, and N, where R represents at least one selected from the group consisting of Y, Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Lu, and Sm, and if Sm is present, Sm constitutes less than 50 atm % of the total R content, the powder including, in an order from the core region, the first coating portion containing P and R, an average atomic concentration of R in the first coating portion being higher than and not higher than twice an average atomic concentration of R in the core region, and the second coating portion having average atomic concentrations of P and R lower than those in the first coating portion, respectively, and containing Fe.
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10.发明公开公开(公告)号：US20230245820A1
公开(公告)日：2023-08-03
申请号：US18296959
申请日：2023-04-06
Applicant: NICHIA CORPORATION
Inventor： Masahiro ABE , Kohei IHARA
CPC classification number: H01F41/028 , H01F1/0577 , B29C45/26
Abstract: Provided are molds for polar anisotropic ring-shaped bonded magnet molded articles which enable the production of bonded magnet molded articles with a high degree of roundness and only slight distortion, without the need for mold modification and preparation of a test mold, and a method of preparing such molds. The present invention relates to a method of preparing a mold for a polar anisotropic ring-shaped bonded magnet molded article, the method including: 1) determining the shrinkage length (Tc) of a desired polar anisotropic ring-shaped bonded magnet molded article using the following equation: Tc=T×(α1/100−α2/100); 2) determining the radius (Dm) of a magnetic pole portion of a mold cavity using the following equation: Dm=D/(1−α2/100); and 3) defining the outer peripheral shape of the mold cavity from the Tc, the Dm, and the number (P) of magnetic poles of the molded article.
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