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:
Apr. 05, 2011
Filed:
Dec. 15, 2006
Yoshihiko Minachi, Tokyo, JP;
Noboru Ito, Tokyo, JP;
Yuuki Aburakawa, Tokyo, JP;
Yoshinori Fujikawa, Tokyo, JP;
Satoko Ueda, Tokyo, JP;
Yoshihiko Minachi, Tokyo, JP;
Noboru Ito, Tokyo, JP;
Yuuki Aburakawa, Tokyo, JP;
Yoshinori Fujikawa, Tokyo, JP;
Satoko Ueda, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
The present invention provides a ferrite magnetic material capable of attaining such magnetic properties that Br+(⅓)HcJ is 6200 or more even by sintering at a temperature of 1150° C. or lower. The ferrite magnetic material includes as a main phase thereof a ferrite phase having a hexagonal structure, the main phase being represented by the following composition formula (1): LaCaα(FeCo)with α representing one or two of Ba and Sr; wherein the constituent ratios of the metal elements constituting the main phase satisfy the following conditions: x and m are the values in a region bounded by the points, A: (0.53, 0.27), B: (0.64, 0.27), C: (0.64, 0.35), D: (0.53, 0.45), E: (0.47, 0.45) and F: (0.47, 0.32) in the (x, m) coordinates shown in FIG.; 1.3≦x/yz≦1.8; and 9.5≦12z≦11.0.