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:
Apr. 15, 1997
Filed:
Nov. 17, 1994
Applicant:
Inventors:
Assignee:
Nissan Chemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 57 ; 264 56 ; 264 61 ;
Abstract
A sintered zirconia sheet is prepared by firing a green sheet of zirconia while placing at least one weight on the sheet to apply a load thereto. Preferably a weight made of a porous material having a porosity of 5 to 30% and having a weight per unit area W (g/cm.sup.2) and a surface area S (cm.sup.2) is placed on the sheet to apply a load per unit area G (g/cm.sup.2) to the sheet under the conditions: S.ltoreq.200, G.ltoreq.5, and W/G.gtoreq.0.5. Sintered zirconia sheets free of camber, distortion or cracking are obtained, particularly when their dimensions are at least 15 cm.times.15 cm and up to 0.5 mm thick.