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. 01, 2016
Filed:
Sep. 29, 2010
Keiichiro Suzuki, Niihama, JP;
Masayuki Narumi, Niihama, JP;
Keiichiro Suzuki, Niihama, JP;
Masayuki Narumi, Niihama, JP;
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Abstract
The present invention aims to provide a process for producing an aluminum titanate-based ceramics fired body wherein a cracking of a ceramics shaped body during a degreasing step is suppressed and also sufficient mechanical strength for handling is provided to the ceramics shaped body for such a case of the transfer from a degreasing step to a firing step. The present invention is a process for producing an aluminum titanate-based ceramics fired body comprising a shaping step of obtaining a ceramics shaped body by shaping a starting material mixture containing inorganic components including an aluminum source powder and a titanium source powder and organic components; a degreasing step for removing the organic components contained in the ceramics shaped body in atmosphere with an oxygen concentration of not higher than 0.1% and under the temperature condition that the highest temperature is not lower than 700° C. and not higher than 1100° C.; and a firing step for firing the ceramics shaped body under the temperature condition that the highest temperature is not lower than 1300° C.; in this order, wherein the atmosphere at a heating step to 1300° C. during the firing step has an oxygen concentration of not lower than 1% and not higher than 6%.