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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Zirconium oxide sintered body and method for producing same
Provided are: a zirconia sintered body which can be produced even when a sintering furnace for sintering at atmospheric pressure is used, and which has mechanical strength and light transmittance required for dental restorations; a method for producing the zirconia sintered body; a precursor for the zirconia sintered body; and/or a method for producing a precursor. This zirconia sintered body is characterized by containing yttrium oxide and zirconia, the yttrium oxide content being 4.5-6.5 mol% inclusive, the remainder being zirconia, the sample thickness being 1 mm, the total light transmittance measured in accordance with JIS K 7361-1 being 46.5% or more, the three-point bending strength being 700 MPa or more, and the total light transmittance being 46.5% or more as measured in accordance with JIS K 7361-1. The ratio of the integrated value of the linear transmittance to the integrated value of the total light transmittance at a sample thickness of 1 mm and a measurement wavelength of 400-700 nm is 1.3% or less.
本发明提供即使使用在大气压下进行烧结的烧结炉也能够制造、并且具有作为牙科修复件所要求的机械强度和透光性的氧化锆烧结体、其制造方法、其前体以及前体的制造方法中的至少任一者。本发明的氧化锆烧结体的特征在于，含有氧化钇及氧化锆，氧化钇含量为4.5mol％以上且6.5mol％以下，余量为氧化锆，试样厚度为1mm且根据JIS K 7361‑1而测定的全光线透过率为46.5％以上，三点弯曲强度为700MPa以上，试样厚度为1mm且测定波长为400～700nm下的直线透过率的累计值相对于全光线透过率的累计值的比为1.3％以下。
Zirconium oxide sintered body and method for producing same
Provided are: a zirconia sintered body which can be produced even when a sintering furnace for sintering at atmospheric pressure is used, and which has mechanical strength and light transmittance required for dental restorations; a method for producing the zirconia sintered body; a precursor for the zirconia sintered body; and/or a method for producing a precursor. This zirconia sintered body is characterized by containing yttrium oxide and zirconia, the yttrium oxide content being 4.5-6.5 mol% inclusive, the remainder being zirconia, the sample thickness being 1 mm, the total light transmittance measured in accordance with JIS K 7361-1 being 46.5% or more, the three-point bending strength being 700 MPa or more, and the total light transmittance being 46.5% or more as measured in accordance with JIS K 7361-1. The ratio of the integrated value of the linear transmittance to the integrated value of the total light transmittance at a sample thickness of 1 mm and a measurement wavelength of 400-700 nm is 1.3% or less.
本发明提供即使使用在大气压下进行烧结的烧结炉也能够制造、并且具有作为牙科修复件所要求的机械强度和透光性的氧化锆烧结体、其制造方法、其前体以及前体的制造方法中的至少任一者。本发明的氧化锆烧结体的特征在于，含有氧化钇及氧化锆，氧化钇含量为4.5mol％以上且6.5mol％以下，余量为氧化锆，试样厚度为1mm且根据JIS K 7361‑1而测定的全光线透过率为46.5％以上，三点弯曲强度为700MPa以上，试样厚度为1mm且测定波长为400～700nm下的直线透过率的累计值相对于全光线透过率的累计值的比为1.3％以下。
Zirconium oxide sintered body and method for producing same
氧化锆烧结体及其制造方法
ITO AKIKO (Autor:in) / WATABE AYAKO (Autor:in) / AZECHI SHO (Autor:in) / NAGAYAMA HITOSHI (Autor:in) / FUJISAKI HIROYUKI (Autor:in)
16.07.2024
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2023
| Europäisches Patentamt | 2024
Zirconium oxide sintered body and method for producing same
| Europäisches Patentamt | 2023
Zirconium oxide sintered body and method for producing same
| Europäisches Patentamt | 2024
Zirconium oxide sintered body and method for producing same
| Europäisches Patentamt | 2024