Michael Tholey,Michael Dorn,Michael Godiker,Norbert Thiel
申请号：
US14391042
公开号：
US10391671B2
申请日:
2013.04.16
申请国别(地区):
US
年份:
2019
代理人:
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.
