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公开(公告)号：US20210093517A1
公开(公告)日：2021-04-01
申请号：US16975193
申请日：2019-02-25
IPC分类号： A61K6/818 , A61C13/083 , A61C13/00
摘要： The invention relates to a process of sintering a dental zirconia restoration, the process comprising a first step of heat-treating a porous dental zirconia article with a heating rate of at least 3 K/sec until a temperature level of 75 to 90% of the final sintering temperature is achieved to obtain a partially sintered dental zirconia article, the porous dental zirconia article having a BET surface of 5 to 12 m2/g and being composed of a 4 mol % yttria stabilized zirconia material and having an alumina content of utmost 0.15 wt. %.
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公开(公告)号：US20220133601A1
公开(公告)日：2022-05-05
申请号：US17310668
申请日：2020-03-02
IPC分类号： A61K6/818 , A61K6/833 , C04B35/488 , C04B38/00 , A61K6/842 , C04B41/00 , C04B41/50 , A61K6/15 , A61K6/20 , A61K6/78
摘要： The invention relates to a process of producing a dental zirconia article, the process comprising the step of sintering a porous dental zirconia article, the sintering comprising a heat-treatment segment A characterized by a heating rate of at least 3 K/sec up to a temperature of at least 1,200° C., the porous dental zirconia article being composed of a zirconia material containing 6.0 to 8.0 wt. % yttria, 0.05 to 0.12 wt. % alumina and comprising a coloring component containing Tb, the porous dental zirconia article being essentially free of Fe components. The invention also relates to a process comprising the additional step of applying a glazing composition to the outer surface of the porous zirconia article before the heat-treatment or sintering is conducted.
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