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. 06, 2007
Filed:
Feb. 25, 2004
Ichiro Tanaka, Invercargill, NZ;
Yoshio Uchida, Tsukuba, JP;
Ichiro Tanaka, Invercargill, NZ;
Yoshio Uchida, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A zirconia sintered body having high strength and high toughness is provided, and a method for producing the same is also provided. The zirconia sintered body comprising tetragonal zirconia, wherein a full width at half maximum at (111) plane of the tetragonal zirconia obtained by X-ray diffraction pattern is from 0.38 to 4 degree. A method for producing the zirconia sintered body, wherein the method comprises steps of; molding zirconia powder having an average particle diameter of from 0.1 to 0.6 μm, a maximum particle diameter of 5 μm or less and a substantially polyhedral shape, and then sintering the molded green body under the temperature of from 1200 to 1400° C.