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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 9604852 B1

PDFFull Text
Date of Patent:
Mar. 28, 2017

Filed:

Sep. 27, 2013

α-alumina particles and method for manufacturing the same

Applicant:

Dic Corporation, Tokyo, JP;

Inventors:

Jianjun Yuan, Sakura, JP;

Hiroshi Kinoshita, Sakura, JP;

Assignee:

DIC Corporation, Tokyo, JP;

Attorney:

Locke Lord LLP

Primary Examiner:

Holly Le

Int. Cl.
CPC ...
C30B 29/00 (2006.01); C01F 7/02 (2006.01); C30B 29/20 (2006.01); C01F 7/30 (2006.01); C01F 7/32 (2006.01); C01F 7/44 (2006.01);
U.S. Cl.
CPC ...
C01F 7/02 (2013.01); C01F 7/30 (2013.01); C01F 7/306 (2013.01); C01F 7/32 (2013.01); C01F 7/442 (2013.01); C30B 29/20 (2013.01); C01P 2002/72 (2013.01); C01P 2002/86 (2013.01); C01P 2004/03 (2013.01); C01P 2004/30 (2013.01); C01P 2004/41 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C01P 2006/80 (2013.01); Y10T 428/2982 (2015.01);
Abstract

The present invention aims to provide a simple and efficient method for manufacturing α-alumina particles, main component particles of which each have a crystal face other than the face [001] as a main crystal face and a polyhedral shape other than a hexagonal bipyramidal shape. According to the method for manufacturing α-alumina particles of the present invention, when an aluminum compound is calcined in the presence of a specific content of a metal compound, α-alumina particles each having a particle diameter of 50 μm or less, a degree of α crystallization of 90% or more, and a polyhedral shape can be obtained.

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