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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 10593454 B1

PDFFull Text
Date of Patent:
Mar. 17, 2020

Filed:

Sep. 02, 2015

Spherical ferrite particles in nano-size and method of manufacturing same

Applicant:

Powdertech Co., Ltd., Chiba, JP;

Inventors:

Koji Aga, Chiba, JP;

Tetsuya Igarashi, Chiba, JP;

Assignee:

POWDERTECH CO., LTD., Chiba, JP;

Attorney:

Greenblum & Berstein, P.L.C.

Primary Examiner:

C Melissa Koslow

Int. Cl.
CPC ...
H01F 1/34 (2006.01); B82Y 40/00 (2011.01); G03G 9/107 (2006.01); B82Y 25/00 (2011.01); C09C 1/22 (2006.01); C09D 7/61 (2018.01); C09D 7/40 (2018.01); C09D 7/62 (2018.01); C01G 49/00 (2006.01); C09D 157/06 (2006.01); C08K 3/013 (2018.01); C08K 3/10 (2018.01); C08K 9/02 (2006.01); C08K 9/06 (2006.01);
U.S. Cl.
CPC ...
H01F 1/344 (2013.01); B82Y 25/00 (2013.01); B82Y 40/00 (2013.01); C01G 49/0072 (2013.01); C09C 1/22 (2013.01); C09D 7/61 (2018.01); C09D 7/62 (2018.01); C09D 7/70 (2018.01); C09D 157/06 (2013.01); G03G 9/107 (2013.01); C01P 2004/03 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2004/84 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); C01P 2006/42 (2013.01); C08K 3/013 (2018.01); C08K 3/10 (2013.01); C08K 9/02 (2013.01); C08K 9/06 (2013.01); C08K 2201/005 (2013.01); C08K 2201/01 (2013.01);
Abstract

An object is to provide the ferrite particles used as a magnetic filler or a raw material for a molded product excellent in dispersibility as a powder and excellent in uniformity after molding and result the surface with small unevenness; and a method of manufacturing the particles. To achieve the object, Mn—Mg ferrite particles having an average particle size of 1 to 2000 nm and having a spherical shape are employed. It is preferable that the ferrite particles are produced by a method including subjecting of a ferrite raw material obtained through preparation of a ferrite composition to flame-spraying in air for ferritization followed by rapid cooling for solidifying of the ferrite.

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