A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
ZIRCONIA CALCINATED BODY AND ZIRCONIA SINTERED BODY
To provide a zirconia sintered body having suppressed irregular shrinkage deformation.SOLUTION: A zirconia calcinated bodies 20 and 22 are obtained by forming a plurality of zirconia powders containing zirconia and a stabilizer for suppressing a phase transition of zirconia and having different compositions, forming a zirconia composition by layering the plurality of zirconia powders, and burning the zirconia composition at 800°C to 1200°C. Then a test piece is prepared by molding the resulting zirconia calcinated body to a rectangular solid shape with dimension of width 50 mm×height 10 mm×depth 5 mm, is burned at 1500°C for 2 hr. Then a zirconia sintered body is obtained in which shrinkage deformation is suppressed to have (maximum intervals between a bottom surface deformed into a concave surface and a ground surface 30)/(distance between grand parts in a width direction)×100 of 0.15 or less, when the test piece is placed with a bottom surface deformed into the concave surface facing down out of two bottom surfaces when surfaces with width 50 mm×depth 5 mm are bottom surfaces 20a and 22a.SELECTED DRAWING: Figure 3
【課題】いびつな収縮変形を抑制したジルコニア焼結体の提供。【解決手段】ジルコニア及びジルコニアの相転移を抑制する安定化剤を含有し、組成が異なる複数のジルコニア粉末を形成し、複数のジルコニア粉末を積層させてジルコニア組成物を形成し、ジルコニア組成物を８００℃〜１２００℃で焼成してジルコニア仮焼体２０，２２を得る。そして、得られたジルコニア仮焼体を幅５０ｍｍ×高さ１０ｍｍ×奥行き５ｍｍの寸法の直方体形状に成形したものを試験片とし、試験片を１５００℃で２時間焼成した後、幅５０ｍｍ×奥行き５ｍｍとなる面を底面２０ａ，２２ａとしたとき、２つの底面のうち、凹面に変形した底面を下にして載置したとき、（凹面に変形した底面と接地面３０との最大間隔）／（幅方向における接地部分間の距離）×１００が０．１５以下であるように収縮変形を抑制したジルコニア焼結体を得る。【選択図】図３
ZIRCONIA CALCINATED BODY AND ZIRCONIA SINTERED BODY
To provide a zirconia sintered body having suppressed irregular shrinkage deformation.SOLUTION: A zirconia calcinated bodies 20 and 22 are obtained by forming a plurality of zirconia powders containing zirconia and a stabilizer for suppressing a phase transition of zirconia and having different compositions, forming a zirconia composition by layering the plurality of zirconia powders, and burning the zirconia composition at 800°C to 1200°C. Then a test piece is prepared by molding the resulting zirconia calcinated body to a rectangular solid shape with dimension of width 50 mm×height 10 mm×depth 5 mm, is burned at 1500°C for 2 hr. Then a zirconia sintered body is obtained in which shrinkage deformation is suppressed to have (maximum intervals between a bottom surface deformed into a concave surface and a ground surface 30)/(distance between grand parts in a width direction)×100 of 0.15 or less, when the test piece is placed with a bottom surface deformed into the concave surface facing down out of two bottom surfaces when surfaces with width 50 mm×depth 5 mm are bottom surfaces 20a and 22a.SELECTED DRAWING: Figure 3
【課題】いびつな収縮変形を抑制したジルコニア焼結体の提供。【解決手段】ジルコニア及びジルコニアの相転移を抑制する安定化剤を含有し、組成が異なる複数のジルコニア粉末を形成し、複数のジルコニア粉末を積層させてジルコニア組成物を形成し、ジルコニア組成物を８００℃〜１２００℃で焼成してジルコニア仮焼体２０，２２を得る。そして、得られたジルコニア仮焼体を幅５０ｍｍ×高さ１０ｍｍ×奥行き５ｍｍの寸法の直方体形状に成形したものを試験片とし、試験片を１５００℃で２時間焼成した後、幅５０ｍｍ×奥行き５ｍｍとなる面を底面２０ａ，２２ａとしたとき、２つの底面のうち、凹面に変形した底面を下にして載置したとき、（凹面に変形した底面と接地面３０との最大間隔）／（幅方向における接地部分間の距離）×１００が０．１５以下であるように収縮変形を抑制したジルコニア焼結体を得る。【選択図】図３
ZIRCONIA CALCINATED BODY AND ZIRCONIA SINTERED BODY
ジルコニア仮焼体及びジルコニア焼結体
YAMADA YOSHIHISA (author) / MATSUMOTO ATSUSHI (author) / ITO TSUGUHISA (author)
2018-11-01
Patent
Electronic Resource
Japanese
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