Patent · US Active

Transparent low-color lithium aluminum silicate glass ceramic and the use thereof

US9296645B2 · kind B2 · utility

1Cited by

4References

43Claims

0Family size

Assignee

Schott AG · DE

Inventors

Friedrich Siebers · Nierstein, DE
Evelin Weiss · Mainz, DE
Klaus Schoenberger · Mainz, DE
Ulrich Schiffner · Mainz, DE
Falk Gabel · Schlangenbad, DE

Key dates

Filing date	Aug 19, 2014
Grant date	Mar 29, 2016
Priority date	—
Expiry date	Aug 19, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C10/0009
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A transparent low-colour lithium aluminium silicate (LAS) glass ceramic and the use thereof are provided. The ceramic has an environmentally friendly composition with high-quartz mixed crystals as the main crystal phase. The glass ceramic contains the following components (in wt % on the basis of oxide): TiO2 1.6-<2.5; Nd2O3 0.005-0.15; MgO 0.2-1.0; ZnO 1-2.5; CaO+SrO 0-1.5; BaO 0-1.5 with the condition B1: MgO+ZnO>CaO+SrO +BaO. In some embodiments, the glass ceramic has a hue c* of less than 5.5, a light transmission Y greater than 81% and has no visually disruptive diffusion.

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