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:
Dec. 25, 2012
Filed:
Sep. 26, 2008
Kazuyuki Nakaue, Okayama, JP;
Shinichi Suenaga, Okayama, JP;
Masahiro Kojima, Okayama, JP;
Hiroya Ikeda, Okayama, JP;
Satoru Tsuboi, Okayama, JP;
Kazuyuki Nakaue, Okayama, JP;
Shinichi Suenaga, Okayama, JP;
Masahiro Kojima, Okayama, JP;
Hiroya Ikeda, Okayama, JP;
Satoru Tsuboi, Okayama, JP;
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Dowa F-Tec Co., Ltd., Okayama, JP;
Abstract
The present invention provides ferrite powders for bonded magnet capable of suppressing increase of SFD, while widening a particle size distribution for obtaining flowability and compressed density, and also capable of suppressing deterioration of orientation and magnetizability, and provides a process for a production magnetoplumbite-type ferrite powders containing an oxide of at least one or more kinds of transition metals selected from a group consisting of Zr, Ti, Zn, Co, Mn, and Ni, having a mean particle size of 0.20 μm or more and less than 5.00 μm, being the ferrite powders for bonded magnet with the ratio of particles having particle size of 1 μm or less being 20 mass % or more in the magnetoplumbite-type ferrite powder size distribution obtained by a laser diffraction type particle size distribution analyzer.