Patent · US Active

UV-radiation absorbing glass with reduced absorption of visible light and method of making and using same

US7700506B2 · kind B2 · utility

2Cited by

2References

20Claims

0Family size

Assignee

Schott AG · DE

Inventors

Joerg Fechner · Mainz, DE
Andreas Reisse · Regensburg, DE
Franz Ott · Mitterteich, DE
Brigitte Hueber · Schwandorf, DE

Key dates

Filing date	Apr 8, 2008
Grant date	Apr 20, 2010
Priority date	—
Expiry date	Apr 8, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C4/085
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The PbO-free UV-absorbing glass is made under oxidative conditions and has a composition, in % by weight, of: SiO2, 55-79; B2O3, 3-25; Al2O3, 0-10; Li2O, 0-10; Na2O, 0-10; K2O, 0-10; MgO, 0-2; CaO, 0-3; SrO, 0-3; BaO, 0-3; ZnO, 0-3; ZrO2, 0-3; CeO2, 0-1; Fe2O3, 0-1; WO3, 0-3; Bi2O3, 0-3; MoO3, 0-3; ΣLi2O+Na2O+K2O=0.5 to 16 and ΣMgO+CaO+SrO+BaO+ZnO=0-10. It also contains from 0.1 to 10% TiO2 with at least 95% of the titanium as Ti+4 so that it has a high visible transmission, reduced color centers, and a sharp UV absorption edge. It is especially useful in lamps, display devices and glass-to-metal seals

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