Patent · US Active

Glass ceramic substrate made of a transparent, colored LAS glass ceramic and method for producing it

US10183888B2 · kind B2 · utility

0Cited by

4References

19Claims

0Family size

Assignee

Schott AG · DE

Inventors

Falk Gabel · Schlangenbad, DE
Oliver Hochrein · Mainz, DE
Evelin Weiss · Mainz, DE
Roland Dudek · Bad Kreuznach, DE
Uwe Martens · Duisburg, DE

Key dates

Filing date	Dec 23, 2015
Grant date	Jan 22, 2019
Priority date	—
Expiry date	Apr 19, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C23/007
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A glass ceramic substrate made of a transparent, colored LAS glass ceramic is provided. The glass ceramic has a gradient layer with keatite solid solution and an underlying core with high-quartz solid solution as predominant crystal phase. The keatite solid solution in a depth of 10 μm or greater exceeds 50% of the sum of the high-quartz solid solution proportion and keatite solid solution proportion. The ceramization includes a crystal transformation step, in which the high-quartz solid solution is transformed at a maximum temperature in the range of 910° to 980° and a time period of between 1 and 25 minutes in part into the keatite solid solution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.