Title:
SINTERED ZIRCONIA, AND SINTERING COMPOSITION AND CALCINED OBJECT THEREFOR
Document Type and Number:
WIPO Patent Application WO/2012/023601
Kind Code:
A1
Abstract:
Provided is sintered zirconia which can be inhibited from deteriorating at low temperatures. Also provided are a sintering composition and a calcined object which are precursors for the sintered zirconia. The burned surface of the sintered zirconia gives an X-ray diffraction pattern in which the ratio of the height of the peak present around the location where a [200] peak assigned to the cubic system is to appear to the height of the peak present around the location where a [200] peak assigned to the tetragonal system is to appear is 0.4 or more, and a region located at a depth of 100 µm or more from the burned surface gives an X-ray diffraction pattern in which the ratio of the height of the peak present around the location where a [200] peak assigned to the cubic system is to appear to the height of the peak present around the location where a [200] peak assigned to the tetragonal system is to appear is 0.3 or less.
Inventors:
ITO YOSHIHISA (JP)
KATO SHINJI (JP)
KATO SHINJI (JP)
Application Number:
PCT/JP2011/068745
Publication Date:
February 23, 2012
Filing Date:
August 19, 2011
Export Citation:
Assignee:
NORITAKE CO LTD (JP)
ITO YOSHIHISA (JP)
KATO SHINJI (JP)
ITO YOSHIHISA (JP)
KATO SHINJI (JP)
International Classes:
C04B35/48
Domestic Patent References:
| WO2011021698A1 | 2011-02-24 |
Foreign References:
| JPH06239662A | 1994-08-30 | |||
| JP2001080962A | 2001-03-27 | |||
| JP2007332026A | 2007-12-27 | |||
| JPH03115166A | 1991-05-16 | |||
| JPH09227228A | 1997-09-02 | |||
| JPH0692728A | 1994-04-05 | |||
| US4525464A | 1985-06-25 | |||
| JP2001080962A | 2001-03-27 | |||
| JP2007332026A | 2007-12-27 | |||
| JPH03115166A | 1991-05-16 | |||
| JPH07215758A | 1995-08-15 | |||
| JPH0833701A | 1996-02-06 | |||
| JP2009023850A | 2009-02-05 | |||
| JP2009192287A | 2009-08-27 | |||
| JP2010064111W | 2010-08-20 | |||
| JP2010044967A | 2010-03-02 |
Other References:
TAIJI YAMAMOTO; ICHIRO KAKEI: "Improvement of heat resistance degradation by surface improvement of Y-TZP", ZIRCONIA CERAMICS 13 AND 14, UCHIDA ROKAKUHO, 1998, pages 147 - 163
See also references of EP 2607334A4
See also references of EP 2607334A4
Attorney, Agent or Firm:
KATO, Asamichi (JP)
Asamichi Kato (JP)
Asamichi Kato (JP)
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Claims: