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:
Nov. 26, 2013
Filed:
Mar. 15, 2011
Shigeki Yanagida, Tokyo, JP;
Takahiro Mori, Tokyo, JP;
Hiroyuki Morita, Tokyo, JP;
Nobuhiro Suto, Tokyo, JP;
Tatsuya Katoh, Tokyo, JP;
Yoshihiko Minachi, Tokyo, JP;
Shigeki Yanagida, Tokyo, JP;
Takahiro Mori, Tokyo, JP;
Hiroyuki Morita, Tokyo, JP;
Nobuhiro Suto, Tokyo, JP;
Tatsuya Katoh, Tokyo, JP;
Yoshihiko Minachi, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A ferrite magnet and a ferrite sintered magnet including a ferrite magnetic material are provided. A main phase of the ferrite magnetic material includes a ferrite phase having a hexagonal crystal structure, and metal element composition expressed by Ca1-w-x-yR wSr xBayFezMm wherein 0.25<w<0.5, 0.01<x<0.35, 0.0001<y<0.013, y<x, 8.7<z<9.9, 1.0<w/m<2.1, 0.017<m/z<0.055 and Si component is at least included as a sub-component, and wherein; when content y1 mass % of the Si component in the ferrite magnetic material, with respect to SiO2, is shown on Y-axis and a total content x1 of z and m is shown on X-axis, a relation between x1 and y1 is within a range surrounded by 4 points placed on X-Y coordinate having the X and Y axes.