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. 11, 2006
Filed:
Aug. 21, 2002
Yutaka Suematsu, Nagoya, JP;
Toru Matsuzaki, Nagoya, JP;
Yasuo Kondo, Nagoya, JP;
Hideaki Matsubara, Nagoya, JP;
Hiroshi Nomura, Nagoya, JP;
Yutaka Suematsu, Nagoya, JP;
Toru Matsuzaki, Nagoya, JP;
Yasuo Kondo, Nagoya, JP;
Hideaki Matsubara, Nagoya, JP;
Hiroshi Nomura, Nagoya, JP;
Kitigawa Industries Co., Ltd., Nagoya, JP;
Japan Fine Ceramics Center, Nagoya, JP;
Abstract
A soft hexagonal ferrite sintered material includes crystal particles of M-type hexagonal ferrite corresponding to a general chemical formula MFeOwherein M is at least one element selected from the group consisting of Ba, Sr and Pb. Crystal particles having particle diameters of 5 μm to 100 μm are extracted from a sintered material produced from a precursor powder mixture. The extracted particles as seed crystals are mixed with a calcined powder comprising fine crystals having the above composition and particle diameters of 0.5 μm to 3 μm, then is sintered until the intended particle growth of the crystal particles in the sintered material is achieved to give an average particle diameter of 30 μm to 500 μm.