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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 10758982 B1

PDFFull Text
Date of Patent:
Sep. 01, 2020

Filed:

Jul. 27, 2017

Magnetic powder and production method thereof, magnetic core and production method thereof, coil component and motor

Applicants:

Murata Manufacturing Co., Ltd., Kyoto, JP;

Tohoku Magnet Institute Co., Ltd., Sendai, Miyagi, JP;

Inventors:

Toru Takahashi, Nagaokakyo, JP;

Akihiro Makino, Sendai, JP;

Noriharu Yodoshi, Sendai, JP;

Assignees:

Murata Manufacturing Co., Ltd., Kyoto, JP;

Tohoku Magnet Institute Co., Ltd., Sendai, JP;

Attorney:

Studebaker & Brackett PC

Primary Examiner:

George Wyszomierski

Int. Cl.
CPC ...
C22C 38/02 (2006.01); C22C 45/02 (2006.01); B22F 9/08 (2006.01); H02K 1/02 (2006.01); B22F 3/00 (2006.01); C22C 38/00 (2006.01); H01F 1/14 (2006.01); H01F 1/22 (2006.01); B22F 1/00 (2006.01); B22F 3/02 (2006.01); B22F 3/24 (2006.01); C22C 38/16 (2006.01); H01F 3/08 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
B22F 9/082 (2013.01); B22F 1/00 (2013.01); B22F 3/00 (2013.01); B22F 3/02 (2013.01); B22F 3/24 (2013.01); B22F 9/08 (2013.01); C22C 38/00 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/16 (2013.01); C22C 45/02 (2013.01); H01F 1/14 (2013.01); H01F 1/22 (2013.01); H01F 3/08 (2013.01); H01F 41/0246 (2013.01); H02K 1/02 (2013.01); B22F 2003/248 (2013.01); B22F 2009/0824 (2013.01); B22F 2009/0848 (2013.01); B22F 2301/35 (2013.01); C22C 2200/02 (2013.01); C22C 2202/02 (2013.01);
Abstract

A magnetic powder is represented by general formula FeSiBPCu. 71.0≤a≤81.0, 0.14≤b/c≤5, 0≤d≤14, 0<e≤1.4, d≤0.8−50, e<−0.1(+d)+10, and a+b+c+d+e=100. A crystallinity is not more than 30% in the case of containing an amorphous phase and a compound phase, and is not more than 60% in the case of not containing a compound phase. The magnetic powder is produced with a gas atomization method. Whereby, it is possible to obtain an alloy magnetic material which has high saturation magnetic flux density and low magnetic loss; and a magnetic core, coil components, and a motor can be realized.

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