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:
Feb. 26, 2013
Filed:
Jan. 19, 2009
Tetsuro Tohma, Niihama, JP;
Keiichiro Suzuki, Niihama, JP;
Satoko Iwato, Shibuya-ku, JP;
Rina Yamanaka, Nagoya, JP;
Tetsuro Tohma, Niihama, JP;
Keiichiro Suzuki, Niihama, JP;
Satoko Iwato, Shibuya-ku, JP;
Rina Yamanaka, Nagoya, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The invention is to provide a process capable of producing aluminium magnesium titanate having a small coefficient of thermal expansion at a firing temperature lower than 1500° C. The production process of the invention comprises maintaining a pre-mixture containing a titania source powder, an alumina source powder, a magnesia source powder and a silica source powder within a temperature range of from 1100° C. to 1350° C. for at least 3 hours, followed by heating up to a temperature not lower than 1400° C. and firing at the temperature. The silica source powder is preferably a powder of alkali feldspar. Aluminium magnesium titanate is prepared according to the production process of the invention, and the resulting aluminium magnesium titanate is ground to give an aluminium magnesium titanate powder.