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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 8795546 B1

PDFFull Text
Date of Patent:
Aug. 05, 2014

Filed:

Dec. 14, 2010

Magnetic ceramic and process for production thereof

Applicants:

Jun Takada, Okayama, JP;

Hideki Hashimoto, Okayama, JP;

Tatsuo Fujii, Okayama, JP;

Makoto Nakanishi, Okayama, JP;

Inventors:

Jun Takada, Okayama, JP;

Hideki Hashimoto, Okayama, JP;

Tatsuo Fujii, Okayama, JP;

Makoto Nakanishi, Okayama, JP;

Assignee:

National University Corporation Okayama University, Okayama, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Carol M Koslow

Int. Cl.
CPC ...
C01G 49/08 (2006.01); C01G 49/06 (2006.01); C04B 35/622 (2006.01); H01F 1/11 (2006.01); H01F 1/34 (2006.01); B82B 1/00 (2006.01); B82B 3/00 (2006.01); H01F 1/42 (2006.01); H01F 1/10 (2006.01); C04B 35/628 (2006.01); B82Y 30/00 (2011.01);
U.S. Cl.
CPC ...
H01F 1/344 (2013.01); C01P 2004/04 (2013.01); C04B 2235/526 (2013.01); C04B 2235/3272 (2013.01); H01F 1/42 (2013.01); C01P 2004/64 (2013.01); C01P 2004/13 (2013.01); C01P 2002/77 (2013.01); C01P 2004/03 (2013.01); C04B 2235/5284 (2013.01); H01F 1/10 (2013.01); C01P 2002/72 (2013.01); C01P 2002/02 (2013.01); C01G 49/06 (2013.01); C01P 2006/42 (2013.01); C04B 35/62807 (2013.01); C04B 2235/5264 (2013.01); B82Y 30/00 (2013.01); C04B 35/62231 (2013.01); C01G 49/08 (2013.01); Y10S 977/773 (2013.01); Y10S 977/811 (2013.01); Y10S 977/838 (2013.01);
Abstract

This invention relates to a magnetic ceramic material comprising, as main components, (a) at least one magnetic iron oxide selected from the group consisting of FeOand γ-FeO, and (b) an amorphous phase, and a process for producing a magnetic ceramic material, comprising (1) heating a microorganism-derived iron oxide ceramic material containing an iron atom, and (2) reducing the iron oxide ceramic material obtained in Step (1) by heating in the presence of hydrogen gas.

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