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

IPC: H01F41/02 ,  B29B7/88 ,  B29C45/00 ,  B29K77/00 ,  B29K505/00 ,  H01F1/057

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.

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

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

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.

公开(公告)号：US20230415227A1

公开(公告)日：2023-12-28

申请号：US18253676

申请日：2021-09-30

Applicant: NICHIA CORPORATION

Inventor： Masahiro ABE ,  Satoshi YAMANAKA ,  Shuichi TADA ,  Kenta IWAI

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

CPC classification number: 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

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 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：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

IPC: H01F1/055 ,  B22F1/145 ,  H01F1/059 ,  H05K9/00

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.

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

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

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.

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

IPC: H01F1/059 ,  H01F1/055

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.