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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 10892090 B1

PDFFull Text
Date of Patent:
Jan. 12, 2021

Filed:

Jul. 19, 2016

Magnet core for low-frequency applications and method for producing a magnet core for low-frequency applications

Applicant:

Vacuumschmelze Gmbh & Co. KG, Hanau, DE;

Inventor:

Jörg Petzold, Kahl, DE;

Assignee:

Vacuumschmelze GmbH & Co. KG, Hanau, DE;

Attorney:

Dickinson Wright PLLC

Primary Examiner:

Xiaowei Su

Int. Cl.
CPC ...
H01F 41/02 (2006.01); C21D 9/00 (2006.01); H01F 1/147 (2006.01); C22C 38/16 (2006.01); C22C 38/10 (2006.01); C22C 38/02 (2006.01); C22C 38/00 (2006.01); C22C 38/12 (2006.01); H01F 1/153 (2006.01); H01F 3/04 (2006.01); C22C 1/02 (2006.01); H01F 27/25 (2006.01); C23C 22/05 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0213 (2013.01); C21D 9/0068 (2013.01); C22C 1/02 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/10 (2013.01); C22C 38/12 (2013.01); C22C 38/16 (2013.01); C23C 22/05 (2013.01); H01F 1/14766 (2013.01); H01F 1/15308 (2013.01); H01F 1/15333 (2013.01); H01F 3/04 (2013.01); H01F 27/25 (2013.01); H01F 41/02 (2013.01); H01F 41/0226 (2013.01); Y10T 29/4902 (2015.01);
Abstract

A magnet core for low-frequency applications and method for producing a magnet core for low-frequency applications is provided. The magnet core is made of a spiral-wound, soft-magnetic, nanocrystalline strip. The strip essentially has the alloy composition FeCoCuNbSiBC, wherein a, b, c, d, e and f are stated in atomic percent and 0≤a≤1; 0.7≤b≤1.4; 2.5≤c≤3.5; 14.5≤d≤16.5; 5.5≤e≤8 and 0≤f≤1, and cobalt may wholly or partially be replaced by nickel. The magnet core has a saturation magnetostriction λof λ<2 ppm, a starting permeability μof μ>100 000 and a maximum permeability μof μ>400 000. In addition, a sealing metal oxide coating is provided on the surfaces of the strip.

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