- 专利标题： ZIRCONIA GRANULE, GREEN COMPACT, AND METHODS OF PRODUCTION THEREOF
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申请号： US18269032申请日： 2021-12-22
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公开(公告)号： US20240059579A1公开(公告)日： 2024-02-22
- 发明人: Kirihiro NAKANO , Nobusuke KASHIKI , Yasutaka KUDO , Yoshihisa ITO
- 申请人： Kuraray Noritake Dental Inc.
- 申请人地址： JP Kurashiki-shi, Okayama
- 专利权人： Kuraray Noritake Dental Inc.
- 当前专利权人： Kuraray Noritake Dental Inc.
- 当前专利权人地址： JP Kurashiki-shi, Okayama
- 优先权： JP 20212777 2020.12.22
- 国际申请： PCT/JP2021/047686 2021.12.22
- 进入国家日期： 2023-06-22
- 主分类号： C01G25/02
- IPC分类号： C01G25/02 ; C01G1/02
摘要：
The present invention provides a granule and green compact suited for obtaining a high-translucency and high-strength zirconia sintered body, and a high-density and uniform pre-sintered body. The invention also provides methods of production of such a granule and green compact. The present invention relates to a granule comprising zirconia, a stabilizing agent capable of preventing a phase transformation of zirconia, and a binder,
the granule having a compression ratio R of 0.46 to 0.53 as calculated by the formula (1) below when tapped and filled into a columnar die in compliance with JIS R 1628:1997, and compressed by uniaxial pressing at a rate of 1 mm/s to 33 MPa,
R=(H−D)/H (1)
wherein H represents a height of the granule tapped and filled into the columnar die before applying pressure, and D represents an amount of strain up to 33 MPa.
the granule having a compression ratio R of 0.46 to 0.53 as calculated by the formula (1) below when tapped and filled into a columnar die in compliance with JIS R 1628:1997, and compressed by uniaxial pressing at a rate of 1 mm/s to 33 MPa,
R=(H−D)/H (1)
wherein H represents a height of the granule tapped and filled into the columnar die before applying pressure, and D represents an amount of strain up to 33 MPa.
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