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Title
Verwendung einer ZrO2-haltigen Glimmerglaskeramik fuer Zahnkronen
Date Issued
1995
Author(s)
Reise, M.
Mueller, G.
Doenitz, F.D.
Patent No
1994-4404921
Abstract
The present invention relates to a process for the production of a processed, high-tensile mica glass ceramic, characterized by the fact that a glass containing zirconium dioxide is melted, tempered at a first temperature and then the resulting ceramic is processed in cooled state, whereupon the processed product is subjected to a second temper stage at a second temperature which is higher than the first. The first temperature is preferably about 150-320 degrees C, with a particularly preferred temperature about 210-320 degrees C above the transition temperature, e.g. at about 900 degrees C, and the second temperature is preferably about 300-500 degrees C, or in particular about 350-470 degrees C above the glass transition temperature, e.g. about 1000-1100 degrees C.
Language
de
Patenprio
DE 1994-4404921 A: 19940216