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. 15, 2005
Filed:
Feb. 24, 2003
Akira Arai, Suwa, JP;
Hiroshi Kato, Suwa, JP;
Akira Arai, Suwa, JP;
Hiroshi Kato, Suwa, JP;
Seiko Epson Corporation, , JP;
Abstract
Disclosed herein is a magnetic powder which can provide a bonded magnet having excellent magnetic properties and having excellent reliability especially excellent heat stability. The magnetic powder is composed of an alloy composition represented by R(FeCo)BAl(where R is at least one kind of rare-earth element, x is 7.1-9.9 at %, y is 0-0.30, z is 4.6-6.9 at %, and w is 0.02-1.5 at %), the magnetic powder being constituted from a composite structure having a soft magnetic phase and a hard magnetic phase, wherein the magnetic powder has magnetic properties in which, when the magnetic powder is formed into an isotropic bonded magnet having a density ρ[Mg/m] by mixing with a binding resin and then molding it, the maximum magnetic energy product (BH)[kJ/m] of the bonded magnet at the room temperature satisfies the relationship represented by the formula (BH)/ρ[×10J·m/g]≧2.1, and the intrinsic coercive force (H) of the bonded magnet at the room temperature is in the range of 320-720 kA/m.