- 专利标题: Method for producing a lithium silicate glass blank and a lithium silicate glass-ceramic blank
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申请号: US14671253申请日: 2015-03-27
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公开(公告)号: US09701572B2公开(公告)日: 2017-07-11
- 发明人: Markus Vollmann , Udo Schusser
- 申请人: DENTSPLY International Inc.
- 申请人地址: US PA York
- 专利权人: DENTSPLY INTERNATIONAL INC.
- 当前专利权人: DENTSPLY INTERNATIONAL INC.
- 当前专利权人地址: US PA York
- 代理商 Leana Levin; Douglas J. Hura; David A. Zdurne
- 优先权: DE102014104401 20140328
- 主分类号: C03C10/00
- IPC分类号: C03C10/00 ; A61C13/00 ; C03B19/02 ; A61K6/02 ; A61K6/027 ; C03C3/097 ; C03C4/00 ; C03B32/02
摘要:
The invention relates to a method for producing a blank of lithium silicate glass a starting composition of at least 8 wt-% of a stabilizer selected from the group consisting of ZrO2, HfO2, and mixtures thereof, wherein the method includes the steps of mixing the raw materials comprising the stabilizer in powder form, wherein the powder of the stabilizer has a particle size d50=x with 0.3 μm≦x≦1.5 μm, melting the raw materials in a crucible at a temperature TAU and storing the melt in the crucible for a time tH, pouring the homogenized melt into molds, wherein the melt flows out of the crucible with a discharge temperature TAB being TAU≧TAB, wherein the filling of the molds and the molding of the melt in the molds takes place with a cooling rate A.
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