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.:
Date of Patent:
Mar. 17, 2020
Filed:
Jul. 24, 2017
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/147 (2006.01); H01F 1/26 (2006.01); B22F 1/00 (2006.01); B22F 9/08 (2006.01); B29C 71/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); B29K 105/18 (2006.01); B29K 505/12 (2006.01); B29L 7/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/14775 (2013.01); B22F 1/00 (2013.01); B22F 1/0055 (2013.01); B22F 9/082 (2013.01); B29C 71/0072 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); H01F 1/14791 (2013.01); H01F 1/26 (2013.01); B22F 2301/35 (2013.01); B29K 2105/18 (2013.01); B29K 2505/12 (2013.01); B29L 2007/002 (2013.01); C22C 2202/02 (2013.01);
Abstract
A magnetic sheet comprises, by vol. %, Fe—Si—Al alloy flat powder: 36% or more. The Fe—Si—Al alloy flat powder comprises, by wt %, 9.3%≤Si≤9.7%, 5.7%≤Al≤6.1%, and remaining Fe. The Fe—Si—Al alloy flat powder has: an aspect ratio in a range of 20 or more and 50 or less; a 50% particle size Din a range of 50 μm or more and 100 μm or less; and a coercivity Hc of 60 A/m or less. The magnetic sheet has a temperature characteristic of permeability μ' measured at 1 MHz exhibiting a maximum value in a range of 0° C. or more and 40° C. or less.