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. 29, 2025
Filed:
Mar. 25, 2020
Applicant:
Daiichi Kigenso Kagaku Kogyo Co., Ltd., Osaka, JP;
Inventor:
Taichi Kunisada, Osaka, JP;
Assignee:
DAIICHI KIGENSO KAGAKU KOGYO CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/48 (2005.12); C04B 35/64 (2005.12);
U.S. Cl.
CPC ...
C04B 35/48 (2012.12); C04B 35/64 (2012.12); C04B 2235/3217 (2012.12); C04B 2235/3232 (2012.12); C04B 2235/3241 (2012.12); C04B 2235/3246 (2012.12); C04B 2235/3267 (2012.12); C04B 2235/3272 (2012.12); C04B 2235/3275 (2012.12); C04B 2235/3284 (2012.12); C04B 2235/5409 (2012.12); C04B 2235/604 (2012.12); C04B 2235/6567 (2012.12); C04B 2235/762 (2012.12); C04B 2235/765 (2012.12); C04B 2235/9661 (2012.12);
Abstract
This zirconia powder contains 2.5 to 3.5 mol % of yttria; has a specific surface area of 5 to 20 m/g; and has crystal phases that include a monoclinic crystal phase percentage of 20 to 40% and a tetragonal crystal phase percentage of 60 to 80%. When the zirconia powder is molded under a mold pressure of 0.8 t/cmand then sintered under a condition of 2 hours at 1450° C. to obtain a sintered body, the sintered body has crystal phases that include a monoclinic crystal phase percentage of 1 to 3%, a tetragonal crystal phase percentage of 77 to 94%, and a cubic crystal phase percentage of 5 to 20%.