Title:
TRANSLUCENT AND HIGHLY TOUGHENED ZIRCONIA SINTERED BODY
Document Type and Number:
WIPO Patent Application WO/2021/229840
Kind Code:
A1
Abstract:
Provided is a zirconia sintered body having excellent fracture toughness, exhibiting excellent translucency, and having excellent resistance to hydrothermal degradation. This zirconia sintered body is composed of zirconia containing 3.5-5.0 mol% of yttrium oxide and/or ytterbium oxide as a stabilizer and 0.3-1.5 mol% of niobium oxide and/or tantalum oxide, and formed so as to have a fracture toughness value of at least 4.5 MPa√m, and an opacity of at most 80.0% at a thickness of 1.5 mm.
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Inventors:
BAN SEIJI (JP)
SUGIYAMA TSUTOMU (JP)
YASUOKA YUTA (JP)
SUGIYAMA TSUTOMU (JP)
YASUOKA YUTA (JP)
Application Number:
PCT/JP2020/039387
Publication Date:
November 18, 2021
Filing Date:
October 20, 2020
Export Citation:
Assignee:
KCM CORP (JP)
BAN SEIJI (JP)
BAN SEIJI (JP)
International Classes:
A61C5/70; C04B35/488; A61C13/083
Domestic Patent References:
| WO2009001739A1 | 2008-12-31 |
Foreign References:
| JP2015127294A | 2015-07-09 | |||
| JP2010514665A | 2010-05-06 | |||
| JPH01108162A | 1989-04-25 | |||
| JPS61242956A | 1986-10-29 |
Other References:
DAE-JOON KIM,HYUNG-JIN JUNG,JOO-WUNG JANG,HONG-LIM LEE: "Fracture Toughness, Ionic Conductivity, and Low-Temperature Phase Stability of Tetragonal Zirconia Cooped with Yttria and Niobium Oxide", JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 81, no. 9, 1 September 1998 (1998-09-01), US, pages 2309 - 2314, XP055872771, ISSN: 0002-7820, DOI: 10.1111/j.1151-2916.1998.tb02626.x
Attorney, Agent or Firm:
NAKASHIMA, Michio et al. (JP)
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