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:
Nov. 27, 2007
Filed:
Sep. 13, 2005
Yoshihisa Beppu, Yokohama, JP;
Kazuo Sunahara, Yokohama, JP;
Hiroyuki Tomonaga, Yokohama, JP;
Kumiko Takahashi, Yokohama, JP;
Yoshihisa Beppu, Yokohama, JP;
Kazuo Sunahara, Yokohama, JP;
Hiroyuki Tomonaga, Yokohama, JP;
Kumiko Takahashi, Yokohama, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
It is an object to provide fine particles of bismuth titanate having excellent dielectric characteristics, high crystallinity and a small particle diameter, and a process for their production. The object is accomplished by a process which comprises a step of obtaining a melt comprising, as represented by mol % based on oxides, from 23 to 72% of BiO, from 4 to 64% of TiOand from 6 to 50% of BO, a step of quickly quenching this melt to obtain an amorphous material, a step of crystallization of bismuth titanate crystals from the above amorphous material, and a step of separating the bismuth titanate crystals from the obtained crystallized material, in this order.