METHOD TO INCREASE THE STRENGTH OF A FORM BODY OF A LITHIUM SILICATE GLASS CERAMIC |
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| 申请号 | US15160529 | 申请日 | 2016-05-20 | 公开(公告)号 | US20160340238A1 | 公开(公告)日 | 2016-11-24 |
| 申请人 | DENTSPLY SIRONA Inc.; | 发明人 | Lothar VÖLKL; Stefan FECHER; | ||||
| 摘要 | The invention relates to a method to increase the strength of a form body of lithium silicate glass ceramic, which after it has a desired end geometry and after the application of a material which influences its surface to form a coating, is subject to a heat treatment. To create a surface compressive stress through the replacement of lithium ions by alkali ions of greater diameter at least that region not covered by the application layer is covered by a melt or paste consisting of or containing a salt of an alkali metal with ions of greater diameter and the form body is in contact with the melt or paste for a period of time t at a temperature T and the melt or paste is subsequently removed from the form body. | ||||||
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