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
PROBLEM TO BE SOLVED: To provide a translucent zirconia sintered body that is excellent in light transmittance, hydrothermal deterioration resistance, and mechanical strength.SOLUTION: Provided is a zirconia sintered body comprising yttria by 6.5 to 10 mol% and alumina by 0.05 to 0.3 wt.% and in which the sum of the tetragonal crystal prime phase percentage and the cubic crystal phase percentage constitutes 90% or more, and the sintered body average particle≤1 μm or less and the light transmittance≥35% (600 nm, 1.0 mm thick), and said sintered body is obtained by sintering a compact of zirconia powder comprising yttria by 6.5 to 10 mol% and alumina by 0.05 to 0.3 wt.% and in which the yttria is in solid solution in the zirconia, and the BET: 6 to 15 m/g and the average particle size≤0.7 μm, by increasing the temperature from 900°C at a speed of 50°C/hour or less and maintaining at 1170 to 1220°C for a predetermined period of time.
【課題】 光透過率、水熱劣化耐性、機械的強度に優れる透光性ジルコニア焼結体を提供する。【解決手段】イットリアを６．５〜１０モル％及びアルミナを０．０５〜０．３重量％含み、正方晶プライム相率と立方晶相率の和が９０％以上からなり、焼結体平均粒≰１μｍ以下、光透過率≧３５％（６００ｎｍ、１．０ｍｍ厚）のジルコニア焼結体であり、該焼結体は、イットリアを６．５〜１０モル％及びアルミナを０．０５〜０．３重量％含み、該イットリアがジルコニアに固溶しており、ＢＥＴ：６〜１５ｍ２／ｇ、平均粒径≰０．７μｍのジルコニア粉末の成形体を、９００℃から５０℃／時間以下の速度で昇温させて１１７０〜１２２０℃で一定時間保持して焼結させて得る。【選択図】 なし
ZIRCONIA SINTERED BODY AND PRODUCTION METHOD THEREOF
PROBLEM TO BE SOLVED: To provide a translucent zirconia sintered body that is excellent in light transmittance, hydrothermal deterioration resistance, and mechanical strength.SOLUTION: Provided is a zirconia sintered body comprising yttria by 6.5 to 10 mol% and alumina by 0.05 to 0.3 wt.% and in which the sum of the tetragonal crystal prime phase percentage and the cubic crystal phase percentage constitutes 90% or more, and the sintered body average particle≤1 μm or less and the light transmittance≥35% (600 nm, 1.0 mm thick), and said sintered body is obtained by sintering a compact of zirconia powder comprising yttria by 6.5 to 10 mol% and alumina by 0.05 to 0.3 wt.% and in which the yttria is in solid solution in the zirconia, and the BET: 6 to 15 m/g and the average particle size≤0.7 μm, by increasing the temperature from 900°C at a speed of 50°C/hour or less and maintaining at 1170 to 1220°C for a predetermined period of time.
【課題】 光透過率、水熱劣化耐性、機械的強度に優れる透光性ジルコニア焼結体を提供する。【解決手段】イットリアを６．５〜１０モル％及びアルミナを０．０５〜０．３重量％含み、正方晶プライム相率と立方晶相率の和が９０％以上からなり、焼結体平均粒≰１μｍ以下、光透過率≧３５％（６００ｎｍ、１．０ｍｍ厚）のジルコニア焼結体であり、該焼結体は、イットリアを６．５〜１０モル％及びアルミナを０．０５〜０．３重量％含み、該イットリアがジルコニアに固溶しており、ＢＥＴ：６〜１５ｍ２／ｇ、平均粒径≰０．７μｍのジルコニア粉末の成形体を、９００℃から５０℃／時間以下の速度で昇温させて１１７０〜１２２０℃で一定時間保持して焼結させて得る。【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法
MATSUI KOJI (author)
2015-11-09
Patent
Electronic Resource
Japanese
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