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ZIRCONIA COMPOSITION, ZIRCONIA CALCINED BODY AND ZIRCONIA SINTERED BODY, AND DENTAL PRODUCT
To provide a zirconia composition with suppressed defect formation and changing transparency, a zirconia calcined body and a zirconia sintered body, and a dental product.SOLUTION: The zirconia composition contains 4-7 mol% of yttria and a light-shielding material, and includes a first region and a second region having high light-shielding material content, wherein the difference between the yttria content in the first region and the yttria content in the second region is 1 mol% or under, and when an L* value in the chromaticity in the L*a*b* color system measured with a white back is shown as a first L* value, an L* value in the L*a*b* color system measured with a black back is shown as a second L* value, and a value obtained by subtraction of the second L* value from the first L* value is shown as ΔL, ΔL in the second region is 4 or over and 11 or under, ΔL in the first region is larger than ΔL of the second region, and the difference between ΔL in the first region and ΔL in the second region is 0.8 or over and 4 or under.SELECTED DRAWING: Figure 1
【課題】欠陥の発生が抑制され、透明性が変化するジルコニア組成物、ジルコニア仮焼体及びジルコニア焼結体、並びに歯科用製品を提供すること。【解決手段】４ｍｏｌ％〜７ｍｏｌ％のイットリア、遮光材を含有し、第１の領域と、遮光材の含有率が高い第２の領域と、を有し、第１の領域におけるイットリアの含有率と第２の領域におけるイットリアの含有率の差は１ｍｏｌ％以下であり、白色を背景にして測定したＬ＊ａ＊ｂ＊表色系による色度におけるＬ＊値を第１のＬ＊値とし、黒色を背景にして測定したＬ＊ａ＊ｂ＊表色系による色度におけるＬ＊値を第２のＬ＊値とし、第１のＬ＊値から第２のＬ＊値を控除した値をΔＬとするとき、第２の領域におけるΔＬは、４以上１１以下であり、第１の領域におけるΔＬは、第２の領域におけるΔＬより大きく、第１の領域におけるΔＬと第２の領域におけるΔＬとの差は、０．８以上４以下である。【選択図】図１
ZIRCONIA COMPOSITION, ZIRCONIA CALCINED BODY AND ZIRCONIA SINTERED BODY, AND DENTAL PRODUCT
To provide a zirconia composition with suppressed defect formation and changing transparency, a zirconia calcined body and a zirconia sintered body, and a dental product.SOLUTION: The zirconia composition contains 4-7 mol% of yttria and a light-shielding material, and includes a first region and a second region having high light-shielding material content, wherein the difference between the yttria content in the first region and the yttria content in the second region is 1 mol% or under, and when an L* value in the chromaticity in the L*a*b* color system measured with a white back is shown as a first L* value, an L* value in the L*a*b* color system measured with a black back is shown as a second L* value, and a value obtained by subtraction of the second L* value from the first L* value is shown as ΔL, ΔL in the second region is 4 or over and 11 or under, ΔL in the first region is larger than ΔL of the second region, and the difference between ΔL in the first region and ΔL in the second region is 0.8 or over and 4 or under.SELECTED DRAWING: Figure 1
【課題】欠陥の発生が抑制され、透明性が変化するジルコニア組成物、ジルコニア仮焼体及びジルコニア焼結体、並びに歯科用製品を提供すること。【解決手段】４ｍｏｌ％〜７ｍｏｌ％のイットリア、遮光材を含有し、第１の領域と、遮光材の含有率が高い第２の領域と、を有し、第１の領域におけるイットリアの含有率と第２の領域におけるイットリアの含有率の差は１ｍｏｌ％以下であり、白色を背景にして測定したＬ＊ａ＊ｂ＊表色系による色度におけるＬ＊値を第１のＬ＊値とし、黒色を背景にして測定したＬ＊ａ＊ｂ＊表色系による色度におけるＬ＊値を第２のＬ＊値とし、第１のＬ＊値から第２のＬ＊値を控除した値をΔＬとするとき、第２の領域におけるΔＬは、４以上１１以下であり、第１の領域におけるΔＬは、第２の領域におけるΔＬより大きく、第１の領域におけるΔＬと第２の領域におけるΔＬとの差は、０．８以上４以下である。【選択図】図１
ZIRCONIA COMPOSITION, ZIRCONIA CALCINED BODY AND ZIRCONIA SINTERED BODY, AND DENTAL PRODUCT
ジルコニア組成物、ジルコニア仮焼体及びジルコニア焼結体、並びに歯科用製品
ITO TSUGUHISA (author) / KUDO TADATAKA (author)
2020-11-05
Patent
Electronic Resource
Japanese
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