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Verwendung einer ZrO2-haltigen Glimmerglaskeramik fuer Zahnkronen

Verfahren zum Herstellen von Glimmerglaskeramiken (A1)
Process for the production of mica glass ceramics
 
: Reise, M.; Mueller, G.; Doenitz, F.D.

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Frontpage ()

DE 1994-4404921 A: 19940216
DE 1994-4404921 A: 19940216
DE 4404921 C2: 19960814
A61K0006
Deutsch
Patent, Elektronische Publikation
Fraunhofer ISC ()

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.

: http://publica.fraunhofer.de/dokumente/PX-39986.html