A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
ZIRCONIA SINTERED BODY AND PRODUCTION METHOD THEREOF
To provide at least either of a zirconia sintered body which can be produced even by using a sintering furnace that performs sintering under atmospheric pressure with the mechanical strength and the translucency desired for use in dental prosthetic materials, a production method thereof, a precursor thereto, and a preparation method of the precursor.SOLUTION: A zirconia sintered body contains yttria and zirconia, has an yttria content of 4.5 to 6.5 mol% and contains the balance of zirconia; the total light transmittance of a 1-mm thick sample measured in accordance with JIS K 7361-1 being 46.5% or higher; its three-point bending strength is 700 MPa or higher; and the ratio of the integrated value of linear transmittance to the integrated value of total light transmittance is 1.3% or less at a sample thickness of 1 mm and a measurement wavelength of 400 to 700 nm.SELECTED DRAWING: None
【課題】大気圧下で焼結を行う焼結炉を使用しても製造することができ、なおかつ、歯科補綴材として要求される機械的強度及び透光性を有するジルコニア焼結体、その製造方法、その前駆体、及び、前駆体の製造方法の少なくともいずれかを提供する。【解決手段】イットリア及びジルコニアを含有し、イットリア含有量が４．５ｍｏｌ％以上６．５ｍｏｌ％以下、残部がジルコニアであり、試料厚さ１ｍｍ、ＪＩＳ Ｋ ７３６１−１に準じて測定される全光線透過率が４６．５％以上であり、三点曲げ強度が７００ＭＰａ以上であり、試料厚さ１ｍｍ、測定波長４００〜７００ｎｍにおける、全光線透過率の積算値に対する直線透過率の積算値の比が１．３％以下であること、を特徴とするジルコニア焼結体。【選択図】 なし
ZIRCONIA SINTERED BODY AND PRODUCTION METHOD THEREOF
To provide at least either of a zirconia sintered body which can be produced even by using a sintering furnace that performs sintering under atmospheric pressure with the mechanical strength and the translucency desired for use in dental prosthetic materials, a production method thereof, a precursor thereto, and a preparation method of the precursor.SOLUTION: A zirconia sintered body contains yttria and zirconia, has an yttria content of 4.5 to 6.5 mol% and contains the balance of zirconia; the total light transmittance of a 1-mm thick sample measured in accordance with JIS K 7361-1 being 46.5% or higher; its three-point bending strength is 700 MPa or higher; and the ratio of the integrated value of linear transmittance to the integrated value of total light transmittance is 1.3% or less at a sample thickness of 1 mm and a measurement wavelength of 400 to 700 nm.SELECTED DRAWING: None
【課題】大気圧下で焼結を行う焼結炉を使用しても製造することができ、なおかつ、歯科補綴材として要求される機械的強度及び透光性を有するジルコニア焼結体、その製造方法、その前駆体、及び、前駆体の製造方法の少なくともいずれかを提供する。【解決手段】イットリア及びジルコニアを含有し、イットリア含有量が４．５ｍｏｌ％以上６．５ｍｏｌ％以下、残部がジルコニアであり、試料厚さ１ｍｍ、ＪＩＳ Ｋ ７３６１−１に準じて測定される全光線透過率が４６．５％以上であり、三点曲げ強度が７００ＭＰａ以上であり、試料厚さ１ｍｍ、測定波長４００〜７００ｎｍにおける、全光線透過率の積算値に対する直線透過率の積算値の比が１．３％以下であること、を特徴とするジルコニア焼結体。【選択図】 なし
ZIRCONIA SINTERED BODY AND PRODUCTION METHOD THEREOF
ジルコニア焼結体及びその製造方法
ITO AKIKO (author) / WATABE AYAKO (author) / AZECHI SHO (author) / NAGAYAMA HITOSHI (author) / FUJISAKI HIROYUKI (author)
2021-04-15
Patent
Electronic Resource
Japanese
ZIRCONIA POWDER, ZIRCONIA SINTERED BODY, AND PRODUCTION METHOD FOR ZIRCONIA SINTERED BODY
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