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:
Sep. 08, 2020
Filed:
Mar. 08, 2013
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Katsuya Kume, Ibaraki, JP;
Toshiaki Okuno, Ibaraki, JP;
Izumi Ozeki, Ibaraki, JP;
Tomohiro Omure, Ibaraki, JP;
Takashi Ozaki, Ibaraki, JP;
Keisuke Taihaku, Ibaraki, JP;
Takashi Yamamoto, Ibaraki, JP;
NITTO DENKO CORPORATION, Ibaraki-Shi, Osaka, JP;
Abstract
There are provided a rare-earth permanent magnet and a manufacturing method of a rare-earth permanent magnet capable of preventing deterioration of magnet properties. In the method, magnet material is milled into magnet powder. Next, a mixtureis prepared by mixing the magnet powder and a binder, and the mixtureis formed into a sheet-like shape to obtain a green sheet. Thereafter, magnetic field orientation is performed to the green sheet, which is then held for several hours in a non-oxidizing atmosphere at a pressure higher than normal atmospheric pressure, at 200 through 900 degrees Celsius for calcination. Thereafter, the calcined green sheetis sintered at a sintering temperature. Thereby a permanent magnetis manufactured.