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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 12676253 B1

PDFFull Text
Date of Patent:
Jul. 07, 2026

Filed:

Mar. 18, 2021

Anisotropic rare earth sintered magnet and method for producing same

Applicant:

Shin-etsu Chemical Co., Ltd., Tokyo, JP;

Inventors:

Tadao Nomura, Fukui, JP;

Kazuki Otsuka, Echizen, JP;

Masayuki Kamata, Tsuruga, JP;

Assignee:

SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Jenny R Wu

Int. Cl.
CPC ...
H01F 1/055 (2006.01); B22F 3/16 (2006.01); B22F 3/24 (2006.01); B22F 9/04 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/10 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/26 (2006.01); C22C 38/30 (2006.01); C22C 38/34 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/0557 (2013.01); B22F 3/16 (2013.01); B22F 3/24 (2013.01); B22F 9/04 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/10 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/26 (2013.01); C22C 38/30 (2013.01); C22C 38/34 (2013.01); H01F 41/0266 (2013.01); B22F 2003/248 (2013.01); B22F 2202/05 (2013.01); B22F 2301/355 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01);
Abstract

An anisotropic rare earth sintered magnet represented by the formula (RZr)(FeCO)(MM). R is Sm and at least one element selected from rare earth elements, Mis at least one element selected from the group consisting of V, Cr, Mn, Ni, Cu, Zn, Ga, Al, and Si, Mis at least one element selected from the group consisting of Ti, Nb, Mo, Hf, Ta, and W, and x, y, a, b, and c each satisfy 7≤x≤15 at %, 4≤y≤20 at %, 0≤a≤0.2, 0≤b≤0.5, and 0≤c≤0.9. The magnet includes 80% by volume or more of a main phase composed of a compound of a ThMntype crystal, the main phase having an average crystal grain size of 1 μm or more, and an intergranular grain boundary phase being formed between adjacent main phase grains.

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Nomura, Tadao. (2026). Anisotropic rare earth sintered magnet and method for producing same (U.S. Patent No. 12676253). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12676253

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