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A platform for research: civil engineering, architecture and urbanism
METHOD FOR PRODUCING ZIRCONIA COMPOSITE CERAMIC AND METHOD FOR PRODUCING ZIRCONIA CERAMIC PROSTHESIS FOR DENTAL USE
To provide a method for efficiently producing zirconia composite ceramics having high bending strength, which can be suitably used as a zirconia ceramic prosthesis for dental use.SOLUTION: In a method for producing a zirconia composite ceramic, a "composite zirconia temporary sintered body" is prepared, is cut using a CAD/CAM system as necessary, and is then actually sintered at a temperature of 1,250-1,800°C. Thereafter, it is slowly cooled to a specific primary cooling temperature in a range of 400-900°C at 100-900°C/hour. Subsequently, it is cooled to 50°C or less at 1,000-9,000°C/hour. The composite zirconia temporary sintered body comprises a temporary sintered body of a stabilized or partially stabilized zirconia powder containing zirconium oxide, a stabilizing agent consisting of yttrium oxide, and an aluminum oxide additive as a main structure, which is composited with a silicon dioxide component such as fine particles of silicon dioxide.SELECTED DRAWING: None
【課題】 歯科用ジルコニアセラミックス補綴物として好適に使用できる、高い曲げ強さを有するジルコニア複合セラミックスを、効率よく製造することができる方法を提供する。【解決手段】 酸化ジルコニウム、酸化イットリウムからなる安定化剤、酸化アルミニウム添加剤を含む、安定化又は部分安定化ジルコニア粉体の仮焼結体を主要構造として含み、これが二酸化ケイ素の微粒子などの二酸化ケイ素成分と複合化した「複合化ジルコニア仮焼結体」を準備し、必要に応じてＣＡＤ／ＣＡＭシステムを用いて切削加工してから１２５０～１８００℃の温度で本焼結し、その後、１００～９００（℃／時間）で４００～９００℃の範囲にある特定の一次冷却温度まで徐冷し、引き続き１０００～９０００（℃／時間）で５０℃以下となるまで冷却する。【選択図】なし
METHOD FOR PRODUCING ZIRCONIA COMPOSITE CERAMIC AND METHOD FOR PRODUCING ZIRCONIA CERAMIC PROSTHESIS FOR DENTAL USE
To provide a method for efficiently producing zirconia composite ceramics having high bending strength, which can be suitably used as a zirconia ceramic prosthesis for dental use.SOLUTION: In a method for producing a zirconia composite ceramic, a "composite zirconia temporary sintered body" is prepared, is cut using a CAD/CAM system as necessary, and is then actually sintered at a temperature of 1,250-1,800°C. Thereafter, it is slowly cooled to a specific primary cooling temperature in a range of 400-900°C at 100-900°C/hour. Subsequently, it is cooled to 50°C or less at 1,000-9,000°C/hour. The composite zirconia temporary sintered body comprises a temporary sintered body of a stabilized or partially stabilized zirconia powder containing zirconium oxide, a stabilizing agent consisting of yttrium oxide, and an aluminum oxide additive as a main structure, which is composited with a silicon dioxide component such as fine particles of silicon dioxide.SELECTED DRAWING: None
【課題】 歯科用ジルコニアセラミックス補綴物として好適に使用できる、高い曲げ強さを有するジルコニア複合セラミックスを、効率よく製造することができる方法を提供する。【解決手段】 酸化ジルコニウム、酸化イットリウムからなる安定化剤、酸化アルミニウム添加剤を含む、安定化又は部分安定化ジルコニア粉体の仮焼結体を主要構造として含み、これが二酸化ケイ素の微粒子などの二酸化ケイ素成分と複合化した「複合化ジルコニア仮焼結体」を準備し、必要に応じてＣＡＤ／ＣＡＭシステムを用いて切削加工してから１２５０～１８００℃の温度で本焼結し、その後、１００～９００（℃／時間）で４００～９００℃の範囲にある特定の一次冷却温度まで徐冷し、引き続き１０００～９０００（℃／時間）で５０℃以下となるまで冷却する。【選択図】なし
METHOD FOR PRODUCING ZIRCONIA COMPOSITE CERAMIC AND METHOD FOR PRODUCING ZIRCONIA CERAMIC PROSTHESIS FOR DENTAL USE
ジルコニア複合セラミックスの製造方法および歯科用ジルコニアセラミックス補綴物の製造方法
HASHIMOTO AKARI (author) / HARA YUTAKA (author) / NAKAJIMA KEI (author)
2023-11-10
Patent
Electronic Resource
Japanese
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