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A platform for research: civil engineering, architecture and urbanism
ZIRCONIA-BASED CERAMICS CALCINED BODY AND METHOD FOR PRODUCING THE SAME, AND DENTAL ZIRCONIA MILL BLANK COMPOSED OF THE ZIRCONIA-BASED CERAMICS CALCINED BODY AND METHOD FOR PRODUCING DENTAL PROSTHESES USING THE DENTAL ZIRCONIA MILL BLANK
To provide a zirconia-based ceramic calcined body used as a dental zirconia mill blank that can suppress chipping and cracking due to accidental loads such as loads and drops during cutting while maintaining good cutting workability.SOLUTION: Provided is for example, a stabilized zirconia or partially stabilized zirconia powder with an alumina additive added for high strength used as a raw material powder for conventional zirconia-based calcined ceramics. Amorphous silicon dioxide covers a neck, which serves as a joint between crystalline zirconium oxide particles, by calcining a powder containing 0.05-5.0 pts.mass of a silicon dioxide source material consisting of amorphous silicon dioxide particles or the like with an average primary particle size of 1-500 nm to 100 pts.mass in terms of silicon dioxide at 600-1200°C.SELECTED DRAWING: None
【課題】 歯科用ジルコニアミルブランクとして使用されるジルコニア系セラミックス仮焼結体において、良好な切削加工性を維持しながら、切削加工時の負荷及び落下等の偶発的な負荷による欠けや割れを抑制できるジルコニア系セラミックス仮焼結体を提供する。【解決手段】 たとえば、従来のジルコニア系セラミックス仮焼結体の原料粉体として使用されている“安定化ジルコニア又は部分安定化ジルコニア粉体に高強度化のためにアルミナ添加剤を添加した粉体”：１００質量部に対して平均１次粒子径が１～５００ｎｍである非晶質二酸化ケイ素粒子等からなる二酸化ケイ素源材料を二酸化ケイ素換算の合計質量部で０．０５～５．０質量部配合した粉体を６００～１２００℃で仮焼結することにより、結晶性酸化ジルコニウム粒子どうしの接合部となるネック部を非晶質性二酸化ケイ素で覆うようにする。【選択図】なし
ZIRCONIA-BASED CERAMICS CALCINED BODY AND METHOD FOR PRODUCING THE SAME, AND DENTAL ZIRCONIA MILL BLANK COMPOSED OF THE ZIRCONIA-BASED CERAMICS CALCINED BODY AND METHOD FOR PRODUCING DENTAL PROSTHESES USING THE DENTAL ZIRCONIA MILL BLANK
To provide a zirconia-based ceramic calcined body used as a dental zirconia mill blank that can suppress chipping and cracking due to accidental loads such as loads and drops during cutting while maintaining good cutting workability.SOLUTION: Provided is for example, a stabilized zirconia or partially stabilized zirconia powder with an alumina additive added for high strength used as a raw material powder for conventional zirconia-based calcined ceramics. Amorphous silicon dioxide covers a neck, which serves as a joint between crystalline zirconium oxide particles, by calcining a powder containing 0.05-5.0 pts.mass of a silicon dioxide source material consisting of amorphous silicon dioxide particles or the like with an average primary particle size of 1-500 nm to 100 pts.mass in terms of silicon dioxide at 600-1200°C.SELECTED DRAWING: None
【課題】 歯科用ジルコニアミルブランクとして使用されるジルコニア系セラミックス仮焼結体において、良好な切削加工性を維持しながら、切削加工時の負荷及び落下等の偶発的な負荷による欠けや割れを抑制できるジルコニア系セラミックス仮焼結体を提供する。【解決手段】 たとえば、従来のジルコニア系セラミックス仮焼結体の原料粉体として使用されている“安定化ジルコニア又は部分安定化ジルコニア粉体に高強度化のためにアルミナ添加剤を添加した粉体”：１００質量部に対して平均１次粒子径が１～５００ｎｍである非晶質二酸化ケイ素粒子等からなる二酸化ケイ素源材料を二酸化ケイ素換算の合計質量部で０．０５～５．０質量部配合した粉体を６００～１２００℃で仮焼結することにより、結晶性酸化ジルコニウム粒子どうしの接合部となるネック部を非晶質性二酸化ケイ素で覆うようにする。【選択図】なし
ZIRCONIA-BASED CERAMICS CALCINED BODY AND METHOD FOR PRODUCING THE SAME, AND DENTAL ZIRCONIA MILL BLANK COMPOSED OF THE ZIRCONIA-BASED CERAMICS CALCINED BODY AND METHOD FOR PRODUCING DENTAL PROSTHESES USING THE DENTAL ZIRCONIA MILL BLANK
ジルコニア系セラミックス仮焼結体及びその製造方法、並びに前記ジルコニア系セラミックス仮焼結体からなる歯科用ジルコニアミルブランク及び該歯科用ジルコニアミルブランクを用いた歯科用補綴物の製造方法
HASHIMOTO AKARI (author) / HARA YUTAKA (author) / NAKAJIMA KEI (author)
2023-02-16
Patent
Electronic Resource
Japanese
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