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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12205738 B1

PDFFull Text
Date of Patent:
Jan. 21, 2025

Filed:

Oct. 07, 2020

Method of producing sintered magnet

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Tae Hoon Kim, Daejeon, KR;

Soon Jae Kwon, Daejeon, KR;

Hyounsoo Uh, Daejeon, KR;

Ikjin Choi, Daejeon, KR;

Jinhyeok Choe, Daejeon, KR;

Ingyu Kim, Daejeon, KR;

Eunjeong Shin, Daejeon, KR;

Nakheon Sung, Daejeon, KR;

Assignee:

LG Chem, Ltd., Seoul, KR;

Attorney:

Lerner David LLP

Primary Examiner:

Brian D Walck

Assistant Examiner:

Nazmun Nahar Shams

Int. Cl.
CPC ...
H01F 1/057 (2006.01); B22F 3/10 (2006.01); B22F 3/24 (2006.01); B22F 3/26 (2006.01); C22C 1/04 (2023.01); C22C 28/00 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/10 (2006.01); C22C 38/16 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/0577 (2013.01); B22F 3/10 (2013.01); B22F 3/26 (2013.01); C22C 1/04 (2013.01); C22C 28/00 (2013.01); C22C 38/005 (2013.01); C22C 38/06 (2013.01); C22C 38/10 (2013.01); C22C 38/16 (2013.01); H01F 41/0253 (2013.01); B22F 2003/248 (2013.01); B22F 2301/355 (2013.01); B22F 2301/45 (2013.01); C22C 2202/02 (2013.01);
Abstract

A method of producing a sintered magnet is disclosed herein. In some embodiments, a method of producing a sintered magnet comprises, sintering a R—Fe—B based magnetic powder to produce a sintered magnet; wherein the R is Nd, Pr, Dy, Ce or Tb, and infiltrating a eutectic alloy into the sintered magnet, wherein the eutectic alloy contains Pr, Al, Cu and Ga, and wherein infiltration the eutectic alloy includes applying the eutectic alloy to the sintered magnet and heat-treating the sintered magnet to which the eutectic alloy is applied.

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