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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.:

US 8889029 B1

PDFFull Text
Date of Patent:
Nov. 18, 2014

Filed:

Aug. 03, 2011

Ferrite sintered body and noise filter including the same

Applicant:

Hidehiro Takenoshita, Kirishima, JP;

Inventor:

Hidehiro Takenoshita, Kirishima, JP;

Assignee:

Kyocera Corporation, Kyoto, JP;

Attorney:

Procopio, Cory, Hargreaves & Savitch, LLP.

Primary Examiner:

Carol M Koslow

Int. Cl.
CPC ...
C04B 35/30 (2006.01); H01F 1/34 (2006.01); H01F 17/04 (2006.01); C09K 3/00 (2006.01); C04B 35/26 (2006.01); H01F 27/33 (2006.01); H01F 41/02 (2006.01); G10K 15/00 (2006.01); C04B 35/626 (2006.01); C04B 35/638 (2006.01); H01F 17/06 (2006.01);
U.S. Cl.
CPC ...
C09K 3/00 (2013.01); C04B 35/2666 (2013.01); C04B 35/2658 (2013.01); H01F 17/04 (2013.01); H01F 27/33 (2013.01); C04B 2235/763 (2013.01); C04B 2235/785 (2013.01); C04B 2235/786 (2013.01); H01F 1/344 (2013.01); H01F 17/06 (2013.01); H01F 41/0246 (2013.01); G10K 15/00 (2013.01); C04B 35/265 (2013.01); C04B 35/62655 (2013.01); C04B 35/62675 (2013.01); C04B 35/638 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3232 (2013.01); C04B 2235/3272 (2013.01); C04B 2235/3279 (2013.01); C04B 2235/3281 (2013.01); C04B 2235/3284 (2013.01); C04B 2235/34 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/6562 (2013.01); C04B 2235/6565 (2013.01); C04B 2235/662 (2013.01); C04B 2235/72 (2013.01); C04B 2235/726 (2013.01); C04B 2235/85 (2013.01); C04B 2235/95 (2013.01); C04B 2235/96 (2013.01); H01F 17/045 (2013.01);
Abstract

A ferrite sintered body having an improved strength and a noise filter including the same are provided. A ferrite sintered body includes 1 mol % to 10 mol % Cu on CuO basis, a spinel-structured crystal containing Fe, Zn, Ni, Cu and O as a main phase, and Cu compound particles present at a grain boundary, having an average particle diameter of 0.5 μm to 10 μm. The ferrite sintered body includes the Cu compound particles present at a grain boundary. It is thereby possible to suppress the grain growth of the crystals serving as the main phase to attain a morphology formed of fine crystals, and also inhibit the propagation of destruction of the grain boundary, thus making it possible to achieve a ferrite sintered body with an improved strength.

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