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    PROCESS FOR PRODUCING A NON-DENSE SINTERED CERAMIC MOLDED BODY HAVING AT LEAST TWO LAYERS
    6.
    发明申请
    PROCESS FOR PRODUCING A NON-DENSE SINTERED CERAMIC MOLDED BODY HAVING AT LEAST TWO LAYERS 审中-公开
    生产不锈钢烧结陶瓷成型体的工艺方法至少有两层

    公开(公告)号：US20150246459A1

    公开(公告)日：2015-09-03

    申请号：US14391042

    申请日：2013-04-16

    申请人： Vita Zahnfabrik H. Rauter GmbH & Co. KG

    发明人： Michael Dorn ,  Michael Godiker ,  Norbert Thiel ,  Michael Tholey

    IPC分类号： B28B1/00 ,  C04B35/48

    CPC分类号： B28B1/008 ,  A61C13/083 ,  A61C13/09 ,  B32B18/00 ,  C04B35/48 ,  C04B35/486 ,  C04B38/00 ,  C04B2111/00836 ,  C04B2235/3246 ,  C04B2235/5409 ,  C04B2235/5445 ,  C04B2235/5472 ,  C04B2235/661 ,  C04B2235/77 ,  C04B2235/9615 ,  C04B2235/9661 ,  C04B2237/066 ,  C04B2237/068 ,  C04B2237/341 ,  C04B2237/348 ,  C04B2237/403 ,  Y10T428/24997

    摘要： A process for producing a non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer; said first powdery material has a presintering temperature T1 that is higher than the presintering temperature Ts of said at least second powdery ceramic material; the course of a curve of shrinkage S1 of said at least first powdery ceramic material differs from the course of a curve of shrinkage S2 of said at least second powdery material, wherein curve of shrinkage S1 is shifted towards higher temperatures as compared to curve of shrinkage S2; and the layers are subjected to a common temperature treatment at a presintering temperature Ts that is lower than the presintering temperature T1 and at least equal to T3 to cause sintering that remains in a stage of sintering that has not proceeded to the theoretical density; wherein the curve of shrinkage S1 is modified by admixing at least one component having a curve of shrinkage S3 which material is compatible with said powdery ceramic material into said first powdery ceramic material, i. e. has a grain size smaller than the first powdery ceramic material, to equalize the curves of shrinkage S1 and S2 in the region of the presintering temperature Ts.

    摘要翻译： 一种制造具有至少两层的非致密烧结陶瓷成型体的方法，其中形成层的第一粉状陶瓷材料与形成至少第二层的至少第二粉末材料接触; 所述第一粉末材料具有比所述至少第二粉状陶瓷材料的预烧结温度Ts高的预烧结温度T1; 所述至少第一粉状陶瓷材料的收缩率S1的过程与所述至少第二粉末材料的收缩率曲线S2的过程不同，其中收缩率S1的曲线与收缩曲线相比向着更高的温度移动 S2; 并且在低于预烧结温度T1并且至少等于T3的预烧结温度Ts下对这些层进行常规温度处理，以引起保持在尚未进行到理论密度的烧结阶段的烧结; 其中收缩S1的曲线通过将具有与所述粉末状陶瓷材料相容的材料的收缩率S3的至少一种成分混合到所述第一粉状陶瓷材料中来进行改性， e。 具有比第一粉状陶瓷材料小的晶粒尺寸，以在预烧结温度Ts的区域中均衡收缩率S1和S2的曲线。

    Process for producing a non-dense sintered ceramic molded body having at least two layers
    8.
    发明授权
    Process for producing a non-dense sintered ceramic molded body having at least two layers 有权

    公开(公告)号：US10391671B2

    公开(公告)日：2019-08-27

    申请号：US14391042

    申请日：2013-04-16

    申请人： Vita Zahnfabrik H. Rauter GmbH & Co. KG

    发明人： Michael Tholey ,  Michael Dorn ,  Michael Godiker ,  Norbert Thiel

    IPC分类号： B28B1/00 ,  C04B35/48 ,  A61C13/083 ,  C04B35/486 ,  C04B38/00 ,  A61C13/09 ,  B32B18/00 ,  C04B111/00

    摘要： A process for producing a non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer; said first powdery material has a presintering temperature T1 that is higher than the presintering temperature Ts of said at least second powdery ceramic material; the course of a curve of shrinkage S1 of said at least first powdery ceramic material differs from the course of a curve of shrinkage S2 of said at least second powdery material, wherein curve of shrinkage S1 is shifted towards higher temperatures as compared to curve of shrinkage S2; and the layers are subjected to a common temperature treatment at a presintering temperature Ts that is lower than the presintering temperature T1 and at least equal to T3 to cause sintering that remains in a stage of sintering that has not proceeded to the theoretical density; wherein the curve of shrinkage S1 is modified by admixing at least one component having a curve of shrinkage S3 which material is compatible with said powdery ceramic material into said first powdery ceramic material, i. e. has a grain size smaller than the first powdery ceramic material, to equalize the curves of shrinkage S1 and S2 in the region of the presintering temperature Ts.