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：US20240347244A1

公开(公告)日：2024-10-17

申请号：US18634412

申请日：2024-04-12

Applicant: NICHIA CORPORATION

Inventor： Ryoya OKAZAKI ,  Jun NISHITSUJI ,  Satoshi ABE ,  Jun AKAMATSU ,  Nobuyoshi IMAOKA

IPC: H01F1/153

CPC classification number: H01F1/15383 ,  H01F1/15308

Abstract: A method of producing a coated soft magnetic material, including: a coating procedure including mixing an aqueous solution containing a phosphate compound and a metal oxoacid compound with a soft magnetic material to form a coating containing a metal phosphorus compound on a surface of the soft magnetic material.

公开(公告)号：US20240347243A1

公开(公告)日：2024-10-17

申请号：US18634272

申请日：2024-04-12

Applicant: NICHIA CORPORATION

Inventor： Ryoya OKAZAKI ,  Jun NISHITSUJI ,  Satoshi ABE ,  Jun AKAMATSU ,  Nobuyoshi IMAOKA

IPC: H01F1/153

CPC classification number: H01F1/15383 ,  H01F1/15308

Abstract: A method of producing a coated magnetic material, including: a coating procedure including mixing an aqueous solution containing a phosphate compound and a compound of a metallic element or a semimetallic element with a soft magnetic material to form a coating containing phosphate and the metallic element or the semimetallic element on a surface of the soft magnetic material; and a pH adjustment procedure including mixing an aqueous solution containing a phosphate compound and a compound of a metallic element or a semimetallic element with the soft magnetic material on which the coating is formed, and adjusting a pH of a mixture of the aqueous solution and the soft magnetic material on which the coating is formed to form a coating containing phosphate and the metallic element or the semimetallic element on a surface of the soft magnetic material on which the coating is formed.

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

IPC: C23C22/07 ,  B22F1/16 ,  B22F1/17 ,  B22F3/16 ,  C23C22/82 ,  H01F1/053 ,  H01F41/02

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.

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

IPC: H01F1/055 ,  H01F41/02 ,  B22F1/145 ,  B22F1/142 ,  B22F1/16

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.