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:
Oct. 08, 2024
Filed:
Mar. 11, 2020
Ngk Spark Plug Co., Ltd., Nagoya, JP;
Hiroshi Watanabe, Nagoya, JP;
Satoshi Mori, Nagoya, JP;
Manami Fujii, Nagoya, JP;
Katsuya Takaoka, Nagoya, JP;
Hiroki Takeuchi, Nagoya, JP;
Hisashi Kozuka, Nagoya, JP;
NITERRA CO., LTD., Nagoya, JP;
Abstract
The iron loss of a dust core is reduced. A dust core () includes soft magnetic metal particles () having an average particle size of 5 μm or more and 30 μm or less, and a particle boundary phase (). The particle boundary phase () includes a polycrystalline compound containing Al (aluminum). When a sectional structure of the dust core () is observed, an area percentage of α-AlOin the particle boundary phase () is 75% or less. An average thickness Ta of the particle boundary phase () is 10 nm or more and 300 nm or less. According to the present invention, the iron loss is reduced.