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:
Aug. 10, 1999
Filed:
Mar. 26, 1996
Applicant:
Inventors:
Takaaki Ami, Kanagawa, JP;
Katsuyuki Hironaka, Kanagawa, JP;
Chiharu Isobe, Tokyo, JP;
Yuji Ikeda, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G / ; C01G / ; C01F / ;
U.S. Cl.
CPC ...
423593 ;
Abstract
A process is disclosed for making a bismuth layered compound, such as Bi.sub.2 SrTa.sub.2 O.sub.9, by forming mixture of Bi.sub.2 O.sub.3, Ta.sub.2 O.sub.5 and a compound selected from strontium hydroxide or strontium nitrate, grinding the mixture, shaping the ground mixture at elevated temperature and pressure to form a pellet of bismuth strontium tantalum oxide having a fluorite structure and then heating the pellet in a flow of oxygen at 800-1000.degree. C. until a single phase bismuth layered compound is obtained.