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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 11984258 B1

PDFFull Text
Date of Patent:
May. 14, 2024

Filed:

Nov. 14, 2018

Rare earth permanent magnet material and preparation method thereof

Applicant:

Advanced Technology & Materials Co., Ltd.;

Inventors:

Lei Zhou, Beijing, CN;

Tao Liu, Beijing, CN;

Xinghua Cheng, Beijing, CN;

Xiaojun Yu, Beijing, CN;

Assignee:

ADVANCED TECHNOLOGY & MATERIALS CO., LTD., Beijing, CN;

Attorney:

LKGlobal | Lorenz & Kopf, LLP

Primary Examiner:

Alexandra M Moore

Assistant Examiner:

Austin Pollock

Int. Cl.
CPC ...
H01F 41/02 (2006.01); B22F 3/105 (2006.01); B22F 3/24 (2006.01); C22C 32/00 (2006.01); C22C 38/00 (2006.01); C23C 12/02 (2006.01); H01F 1/057 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0293 (2013.01); B22F 3/105 (2013.01); B22F 3/24 (2013.01); C22C 32/00 (2013.01); C22C 32/001 (2013.01); C22C 38/005 (2013.01); C23C 12/02 (2013.01); H01F 1/057 (2013.01); H01F 41/0266 (2013.01); B22F 2003/1051 (2013.01); B22F 2003/248 (2013.01); B22F 2301/355 (2013.01); B22F 2304/10 (2013.01); C22C 2202/02 (2013.01);
Abstract

The present invention discloses a rare earth permanent magnet material and a preparation method thereof. The method includes a sintering treatment step performed by laying a composite powder for diffusion on the surface of a neodymium iron boron magnetic powder layer and carrying out spark plasma sintering treatment to obtain a neodymium iron boron magnet with a diffusion layer solidified on the surface thereof, and diffusion heat treatment and tempering steps. The method of the present invention has high efficiency, good diffusion effects, and reduced quantities of heavy rare earth elements.

Find Patent Forward Citations

Zhou, Lei. (2024). Rare earth permanent magnet material and preparation method thereof (U.S. Patent No. 11984258). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11984258

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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