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:
Feb. 28, 2023
Filed:
Jul. 08, 2019
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Kenta Takagi, Nagoya, JP;
Wataru Yamaguchi, Nagoya, JP;
Takaaki Yokoyama, Nagaokakyo, JP;
Kenji Sakaguchi, Nagaokakyo, JP;
Kazuhiro Yoshii, Nagaokakyo, JP;
Yuji Yokoyama, Nagaokakyo, JP;
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, Tokyo, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A sintered magnet contains Sm—Fe—N-based crystal grains and has high coercivity; and a magnetic powder is capable of forming a sintered magnet without lowering the coercivity even if heat is generated in association with the sintering. A sintered magnet comprises a crystal phase composed of a plurality of Sm—Fe—N-based crystal grains and a nonmagnetic metal phase present between the Sm—Fe—N crystal grains adjacent to each other, wherein a ratio of Fe peak intensity Ito SmFeN peak intensity Imeasured by an X-ray diffraction method is 0.2 or less. A magnetic powder comprises Sm—Fe—N-based crystal particles and a nonmagnetic metal layer covering surfaces of the Sm—Fe—N crystal particles.