Hochfeste transluzente Glimmer-Glaskeramiken, Verfahren zu ihrer Herstellung und Verwendung
Glass ceramic with mica and ZrO2 crystals contains (in wt.%): 0-9K2O; 0-9Na2O (Na2O+K2O = approximate 4 wt.%); 35-60 SiO2; 1-=25 MgO; 7-30 Al2O3; 4-12 ZrO2; 2-10 F-, and is essentially free of Ca, Sr and Ba. Production of the ceramic is also claimed, in which the starting materials are mixed and melted at 1300-160 deg. C, and the molten glass is, after cooling, slowly and/or continuously brought to crystallisation temperature. The starting materials are fluorides oxides, carbonates and other salts which form oxides at high temperatures. USE - The ceramic is used as a tooth replacement (claimed). ADVANTAGE - The ceramic has high mechanical strength,high translucent property, and can be easily processed.
DE 1996-19610300 A: 19960315