公开(公告)号：US20200055779A1

公开(公告)日：2020-02-20

申请号：US16484858

申请日：2018-02-08

申请人： 3M INNOVATIVE PROPERTIES COMPANY

发明人： Bjorn THEELKE ,  Rainer K. DITTMANN

IPC分类号： C04B35/488 ,  A61C13/00 ,  A61C13/083 ,  A61C13/08 ,  C04B35/64 ,  C04B35/624 ,  C04B35/634 ,  A61K6/02 ,  B33Y70/00 ,  B28B11/24 ,  B28B1/14 ,  B28B1/00 ,  B33Y10/00

摘要： The invention relates to a porous zirconia article in particular for use in the dental or orthodontic field, the porous zirconia article comprising ZrO2: 80 to 87 wt. %,Y2O3: 3 to 5 wt. %, AI2O3: 10 to 14 wt. %, wt. % with respect to the weight of the porous zirconia article, the porous zirconia article being characterized by a BET surface from 15 to 100 m2/g. The invention also relates to a sintered zirconia article in particular for use in the dental or orthodontic field, the sintered zirconia article comprising ZrO2: 80 to 87 wt 5, Y2O3: 3 to 5 wt. %), AI2O3: 10 to 14 wt. %, wt. %) with respect to the weight of the porous zirconia article, the sintered zirconia article being characterized by a corundum crystal phase content of 7 to 12 wt. %>and a flexural strength of at least 2,000 MPa.

公开(公告)号：US20190231494A1

公开(公告)日：2019-08-01

申请号：US16095433

申请日：2017-10-21

申请人： 3M INNOVATIVE PROPERTIES COMPANY

发明人： Rainer K. DITTMANN ,  Hans R. SCHNAGL ,  Grit KINDLER ,  Björn THEELKE ,  Michael SOGL ,  Michaela URBAN

IPC分类号： A61C13/00 ,  A61C13/083

CPC分类号： A61C13/0022 ,  A61C13/082 ,  A61C13/083 ,  C04B35/48 ,  C04B2235/9661

摘要： The invention relates to a porous multi-layered coloured zirconia dental mill blank comprising a bottom layer B having the composition COMP-B which comprises ceramic components CER-COMP-B, colouring components COL-COMP-B and stabilizing components STAB-COMP-B, a top layer E having the composition COMP-E which comprises ceramic components CER-COMP-E, colouring components COL-COMP-E stabilizing components STAB-COMP-E, at least one intermediate layer Ex having the composition COMP-E of top layer E, at least one intermediate layer Bx having the composition COMP-B of bottom layer B, x being an integer and indicating the number of intermediate layers, wherein the layers with compositions COMP-B and COMP-E are arranged in alternating order, and wherein the thickness of the individual layers B, Bx is decreasing from bottom to top and the thickness of the individual layers E, Ex is decreasing from top to bottom. The dental mill blank can be used for producing dental articles.