Invention Application
US20150315086A1 COLORED TRANSLUCENT ZIRCONIA SINTERED BODY AND ITS USE 有权
彩色透明ZIRCONIA烧结体及其使用

  • Patent Title: COLORED TRANSLUCENT ZIRCONIA SINTERED BODY AND ITS USE
  • Patent Title (中): 彩色透明ZIRCONIA烧结体及其使用
  • Application No.: US14651375
    Application Date: 2013-12-26
  • Publication No.: US20150315086A1
    Publication Date: 2015-11-05
  • Inventor: Kiyotaka KAWAMURAHiroyuki FUJISAKI
  • Applicant: TOSOH CORPORATION
  • Applicant Address: JP Yamaguchi
  • Assignee: TOSOH CORPORATION
  • Current Assignee: TOSOH CORPORATION
  • Current Assignee Address: JP Yamaguchi
  • Priority: JP2012-286955 20121228; JP2012-286957 20121228; JP2013-174623 20130826
  • International Application: PCT/JP2013/084973 WO 20131226
  • Main IPC: C04B35/488
  • IPC: C04B35/488 A61K6/02
COLORED TRANSLUCENT ZIRCONIA SINTERED BODY AND ITS USE
Abstract:
A pink-colored zirconia sintered body has a high sintered body density and strength, and a colored translucency, which has a color tone similar to teeth and excellent translucency and has high aesthetic properties. A colored translucent zirconia sintered body includes from 2 to 4 mol % of yttria, from 0.02 to 0.8 mol % of Er2O3, at least 20 and less than 2,000 ppm, as calculated as Fe2O3, of an iron compound, at least 0.005 and less than 0.2 wt % of Al2O3 and the rest being zirconia, and having a lightness L* of from 55 to 75, a* of from 0 to 10 and b* of from 0 to 30 as chromatic parameters stipulated in JIS-Z8729, has a relative density of at least 99.80% and has a total light transmittance of at least 18% and at most 40% as measured at a sample thickness of 1 mm using a D65 light source.
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