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AssigneeSchott AG
InventorsThilo Zachau, Friedrich Siebers, Ulrich Schiffner, Kurt Schaupert
Estimating the term…
The process for producing a transparent lithium aluminosilicate glass ceramic plate includes ceramicizing a green glass body of the Li2O—Al2O—SiO2 system using a ceramization program, which includes heating it, for the purpose of nucleation, to a temperature of 750° C.±20° C. and maintaining the temperature for 20±15 minutes, further heating the green glass body, for the purpose of ceramization, to a temperature of 900±20° C. and maintaining the to temperature for 20±15 minutes and then cooling to room temperature. The transparent plate has a thermal expansion coefficient (CTE) from −0.15×10−6/K to +0.15×10−6/K at 30 to 700° C. and a brightness value observed at an angle of 2° of ≧80 for a 4-mm thick plate for transmitted normal light.
A process for producing a transparent plate, said process comprising the following steps:
Dependencies are inferred from the claim text.