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:
Jul. 23, 2013
Filed:
Mar. 28, 2011
Izumi Ozeki, Ibaraki, JP;
Katsuya Kume, Ibaraki, JP;
Keisuke Hirano, Ibaraki, JP;
Tomohiro Omure, Ibaraki, JP;
Keisuke Taihaku, Ibaraki, JP;
Takashi Ozaki, Ibaraki, JP;
Izumi Ozeki, Ibaraki, JP;
Katsuya Kume, Ibaraki, JP;
Keisuke Hirano, Ibaraki, JP;
Tomohiro Omure, Ibaraki, JP;
Keisuke Taihaku, Ibaraki, JP;
Takashi Ozaki, Ibaraki, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
There are provided a permanent magnet and a manufacturing method thereof that enables concentration of V, Mo, Zr, Ta, Ti, W or Nb contained in an organometallic compound in grain boundaries of the permanent magnet. To fine powder of milled neodymium magnet is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR)(M represents V, Mo, Zr, Ta, Ti, W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon,represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, a compact body obtained by compacting the magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius so as to perform a calcination process in hydrogen. Thereafter, through sintering, a permanent magnet is manufactured.