US 11,306,020 B2 · Glass sheet with a high luminous transmittance and with warm-toned to neutral colored edges

Abstract

The invention relates to a glass sheet having a luminous transmission LTD4≥87% and having a composition free of antimony and arsenic, comprising total iron (expressed in the form of Fe2O3) from 0.002-0.04% and erbium (expressed in the form of Er2O3) from 0.003-0.1%. The glass sheet composition further having a redox ratio ≤32% and satisfying the formula 1.3*Fe2O3≤Er2O3−21.87*Cr2O3−53.12*Co≤2.6*Fe2O3. Such a glass sheet has a high luminous transmittance and has warm-toned to neutral colored edges and is particularly suitable due to its aesthetics as building glass or interior glass, as well as in furniture applications, as automotive glass, or as cover glass in electronic devices/displays.

Claims20

Dependent claims

A glass sheet having a composition comprising in weight percentage with respect to a total weight of the glass:

SiO2
40-78%;
Al2O3
0-18%;
B2O3
0-18%;
Na2O
0-20%;
CaO
0-15%;
MgO
0-12%;
K2O
0-12%;
BaO
0-5%;
total iron (expressed in the form of Fe2O3) 0.002-0.04 wt %;
and
erbium (expressed in the form of Er2O3) 0.003-0.1 wt %,
wherein the glass sheet composition has a redox ratio ≤32%,
wherein 1.3*Fe2O3≤Er2O3-21.87*Cr2O3-53.12*Co≤2.6*Fe2O3,
wherein the glass sheet composition is free of antimony and arsenic,
wherein the glass sheet has a luminous transmission LTD4 ≥87%, and
wherein the glass sheet has a* ≥0 and b* ≥0, a* and b* being measured for a sheet thickness of 4 mm in transmission with illuminant D65, 10°, SCI.

21 more elements

Dependencies are inferred from the claim text.

Glass sheet with a high luminous transmittance and with warm-toned to neutral colored edges

Life of this patent

Glass sheet with a high luminous transmittance and with warm-toned to neutral colored edges

Life of this patent

Abstract

Claims20