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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 11597010 B1

PDFFull Text
Date of Patent:
Mar. 07, 2023

Filed:

Aug. 21, 2018

Plurality of flaky magnetic metal particles, pressed powder material, and rotating electric machine

Applicant:

Kabushiki Kaisha Toshiba, Tokyo, JP;

Inventors:

Hiroaki Kinouchi, Shinagawa Tokyo, JP;

Tomohiro Suetsuna, Kawasaki Kanagawa, JP;

Takahiro Kawamoto, Kawasaki Kanagawa, JP;

Yasuyuki Hotta, Ota Tokyo, JP;

Assignee:

KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;

Attorney:

Amin, Turocy & Watson, LLP

Primary Examiner:

Matthew E Hoban

Assistant Examiner:

Lynne Edmondson

Int. Cl.
CPC ...
H01F 1/24 (2006.01); H01F 1/26 (2006.01); H01F 1/33 (2006.01); H01F 1/147 (2006.01); B22F 1/068 (2022.01); H02K 1/02 (2006.01); B22F 1/0545 (2022.01); B22F 9/04 (2006.01); B22F 3/02 (2006.01); B22F 1/17 (2022.01); H01F 1/153 (2006.01); B22F 1/054 (2022.01);
U.S. Cl.
CPC ...
B22F 1/0545 (2022.01); B22F 1/17 (2022.01); B22F 3/02 (2013.01); B22F 9/04 (2013.01); H01F 1/24 (2013.01); H02K 1/02 (2013.01); B22F 1/0551 (2022.01); B22F 2009/043 (2013.01); B22F 2009/048 (2013.01); B22F 2304/05 (2013.01); B22F 2304/10 (2013.01); H01F 1/153 (2013.01);
Abstract

Provided is a plurality of flaky magnetic metal particles of embodiments, each flaky magnetic metal particle having a flat surface having either or both of a plurality of concavities and a plurality of convexities, the concavities or convexities being arranged in a first direction and each having a width of 0.1 μm or more, a length of 1 μm or more, and an aspect ratio of 2 or higher; and a magnetic metal phase containing at least one primary element selected from the group consisting of iron (Fe), cobalt (Co), and nickel (Ni). The flaky magnetic metal particles have an average thickness of between 10 nm and 100 μm inclusive, and the average value of the ratio of the average length within the flat surface with respect to the thickness is between 5 and 10,000 inclusive.

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