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:
Mar. 09, 2021
Filed:
Dec. 19, 2018
Applicant:
Showa Denko K.k., Tokyo, JP;
Inventor:
So Miyaishi, Kawasaki, JP;
Assignee:
SHOWA DENKO K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/10 (2006.01); C04B 35/111 (2006.01); C04B 35/632 (2006.01); C04B 35/64 (2006.01);
U.S. Cl.
CPC ...
C04B 35/10 (2013.01); C04B 35/6325 (2013.01); C04B 35/64 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3215 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/48 (2013.01); C04B 2235/656 (2013.01); C04B 2235/728 (2013.01);
Abstract
A method for producing an alumina sintered body, including: a step of applying an alkaline earth metal compound onto a surface of an alumina raw material which is an unsintered alumina compact or an alumina sintered body; and a step of subjecting the alumina raw material to which the alkaline earth metal compound has been applied to heat treatment at a temperature of 1200° C. or more for 5 minutes or more and 300 minutes or less.