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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 10576539 B1

PDFFull Text
Date of Patent:
Mar. 03, 2020

Filed:

Mar. 08, 2016

Flat soft magnetic powder and production method therefor

Applicant:

Sanyo Special Steel Co., Ltd., Himeji-shi, JP;

Inventors:

Fumihiro Maezawa, Himeji, JP;

Toshiyuki Sawada, Himeji, JP;

Assignee:

Sanyo Special Steel Co., Ltd., Hyogo, JP;

Attorney:
Primary Examiner:

C Melissa Koslow

Int. Cl.
CPC ...
B22F 1/00 (2006.01); C22C 38/02 (2006.01); B22F 9/10 (2006.01); B22F 9/08 (2006.01); C22C 38/06 (2006.01); C22C 33/02 (2006.01); H05K 9/00 (2006.01); C22C 38/00 (2006.01); B22F 9/04 (2006.01); H01F 1/20 (2006.01); H01F 1/147 (2006.01); B22F 3/18 (2006.01); B22F 5/00 (2006.01);
U.S. Cl.
CPC ...
B22F 1/0055 (2013.01); B22F 1/0081 (2013.01); B22F 1/0085 (2013.01); B22F 1/0088 (2013.01); B22F 9/04 (2013.01); B22F 9/082 (2013.01); B22F 9/10 (2013.01); C22C 33/0278 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); H01F 1/14791 (2013.01); H01F 1/20 (2013.01); H05K 9/0081 (2013.01); B22F 3/18 (2013.01); B22F 5/006 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); C22C 2202/02 (2013.01);
Abstract

Provided is a flaky soft magnetic powder including an Fe—Si—Al alloy having an oxygen content of 0.6 mass % or less, a manganese content of 0.1 mass % to 1.0 mass %, and the balance incidental impurities. The flaky soft magnetic powder has an average particle size of 43 to 60 μm and exhibits a coercive force Hc of 106 A/m or less as measured under application of a magnetic field in an in-plane direction of the flaky soft magnetic powder. The ratio of the tap density to the true density of the flaky soft magnetic powder is 0.17 or less. Also provided is a method of producing the flaky soft magnetic powder. The use of the flaky soft magnetic powder can produce a magnetic sheet having particularly high magnetic permeability.

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