Colored glass compositions
View Patent ↗A glass composition is disclosed. The glass composition includes base glass composition including SiO 2 from 65 to 75 weight percent, Na 2 O from 10 to 20 weight percent, CaO from 5 to 15 weight percent, MgO from 0 to 5 weight percent, Al 2 O 3 from 0 to 5 weight percent, K 2 O from 0 to 5 weight percent, and BaO from 0 to 1 weight percent, and a colorant and property modifying portion including total iron from up to 0.02 weight percent, CeO 2 from 0.05 weight percent to 1.5 weight percent, CoO up to 50 PPM, Se up to 15 PPM, Cr 2 O 3 up to 500 PPM, CuO up to 0.5 weight percent, V 2 O 5 up to 0.3 weight percent, TiO 2 up to 1 weight percent, NiO up to 200 PPM, Er 2 O 3 up to 3 weight percent, MnO 2 up to 0.6 weight percent, and Nd 2 O 3 up to 2 weight percent, wherein the glass composition has a redox ratio up to 0.55.
1. A glass composition comprising a base glass composition comprising:
SiO 2
65 to 75
weight percent,
Na 2 O
10 to 20
weight percent,
CaO
5 to 15
weight percent,
MgO
0 to 5
weight percent,
Al 2 O 3
0 to 5
weight percent,
K 2 O
0 to 5
weight percent, and
BaO
0 to 1
weight percent,
and a colorant and property modifying portion comprising:
total iron
up to 0.02
weight percent,
CeO 2
0.05 to 1.5
weight percent,
CoO
0 to 50
PPM,
Se
0 to 15
PPM,
Cr 2 O 3
0 to 500
PPM,
CuO
0 to 0.5
weight percent,
V 2 O 5
0 to 0.3
weight percent,
TiO 2
0 to 1
weight percent,
NiO
0 to 200
PPM,
Er 2 O 3
0 to 3
weight percent,
MnO 2
0 to 0.6
weight percent, and
Nd 2 O 3
0 to 2
weight percent,
wherein the glass composition has a redox ratio up to 0.55, and the colorant and property modifying portion further comprising Er 2 O 3 in a range of 0.5 to 2 weight percent or Nd 2 O 3 in a range of 0.5 to 2 weight percent.
2. The glass composition according to claim 1 , wherein the redox ratio ranges from 0.05 to 0.525.
3. The glass composition according to claim 1 , wherein the CeO 2 ranges from 0.75 weight percent to 1.0 weight percent.
4. The glass composition according to claim 1 , wherein the redox ratio ranges from 1.0 to 0.5.
5. The glass composition according to claim 1 , wherein at least one of the following materials is present in the recited amount: CoO from 2 to 35 PPM, Se from 3 to 14 PPM, Cr 2 O 3 from 10 to 300 PPM, CuO up to 0.3 weight percent, V 2 O 5 up to 0.2 weight percent, TiO 2 from 0.15 to 0.8 weight percent, NiO from 5 to 100 PPM, and MnO 2 from 0.1 to 0.5 weight percent.
6. A glass sheet made from the composition according to claim 1 .
7. A glass sheet according to claim 6 that exhibits an Lta greater than or equal to 70% at a thickness of 0.223 inches (5.664 mm).
8. A glass sheet according to claim 7 that exhibits an Lta greater than or equal to 85% at a thickness of 0.223 inches (5.664 mm).
9. A glass composition comprising a base glass composition comprising:
SiO 2
65 to 75
weight percent,
Na 2 O
10 to 20
weight percent,
CaO
5 to 15
weight percent,
MgO
0 to 5
weight percent,
Al 2 O 3
0 to 5
weight percent,
K 2 O
0 to 5
weight percent, and
BaO
0 to 1
weight percent,
and a colorant and property modifying portion comprising:
total iron
up to 0.02
weight percent,
CeO 2
0.05 to 1.5
weight percent,
CoO
0 to 50
PPM,
Se
0 to 15
PPM,
Cr 2 O 3
0 to 500
PPM,
CuO
0 to 0.5
weight percent,
V 2 O 5
0 to 0.3
weight percent,
TiO 2
0 to 1
weight percent,
NiO
0 to 200
PPM,
MnO 2
0 to 0.6
weight percent,
wherein the glass composition has a redox ratio up to 0.55, and the colorant and property modifying portion further comprises Er 2 O 3 in a range of 0.5 to 1.5 weight percent or Nd 2 O 3 in a range of 0.5 to 2 weight percent, wherein the colorant and property modifying portion comprises at least: CoO from 5 to 25 PPM, Se from 5 to 12 PPM, Cr 2 O 3 from 20 to 200 PPM, CuO up to 0.1 weight percent, V 2 O 5 up to 0.1 weight percent, TiO 2 from 0.2 to 0.6 weight percent, NiO from 10 to 50 PPM or MnO 2 from 0.2 to 0.4 weight percent.
10. A glass sheet comprising a glass composition that includes:
SiO 2
65 to 75
weight percent,
Na 2 O
10 to 20
weight percent,
CaO
5 to 15
weight percent,
MgO
0 to 5
weight percent,
Al 2 O 3
0 to 5
weight percent,
K 2 O
0 to 5
weight percent, and
BaO
0 to 1
weight percent,
and a colorant and property modifying portion comprising:
total iron
up to 0.02
weight percent,
CeO 2
0.05 to 1.5
weight percent,
CoO
0 to 50
PPM,
Se
0 to 15
PPM,
Cr 2 O 3
0 to 500
PPM,
CuO
0 to 0.5
weight percent,
V 2 O 5
0 to 0.3
weight percent,
TiO 2
0 to 1
weight percent,
NiO
0 to 200
PPM,
MnO 2
0 to 0.6
weight percent, and
wherein the glass composition has a redox ratio up to 0.55, wherein the glass sheet exhibits an Lta of equal to or greater than 70 percent at a thickness of 0.223 inches (5.664 mm), and the colorant and property modifying portion further comprises Er 2 O 3 in a range of 0.5 to 2weight percent or Nd 2 O 3 in a range of 0.5 to 2 weight percent.
11. The glass sheet according to claim 10 , wherein at least one of the following materials is present in the recited amount: CoO from 2 to 35 PPM, Se from 3 to 14 PPM, Cr 2 O 3 from 10 to 300 PPM, CuO up to 0.3 weight percent, V 2 O 5 up to 0.2 weight percent, TiO 2 from 0.15 to 0.8 weight percent, NiO from 5 to 100 PPM, and MnO 2 from 0.1 to 0.5 weight percent.
12. A method of making a glass composition comprising: processing batch materials to form a glass composition comprising:
SiO 2
65 to 75 weight percent,
Na 2 O
10 to 20 weight percent,
CaO
5 to 15 weight percent,
MgO
0 to 5 weight percent,
Al 2 O 3
0 to 5 weight percent,
K 2 O
0 to 5 weight percent, and
BaO
0 to 1 weight percent,
and a colorant and property modifying portion comprising:
total iron
up to 0.02 weight percent,
CeO 2
0.05 weight percent to 1.5 weight percent,
CoO
0 to 50 PPM,
Se
0 to 15 PPM,
Cr 2 O 3
0 to 500 PPM,
CuO
0 to 0.5 weight percent,
V 2 O 5
0 to 0.3 weight percent,
TiO 2
0 to 1 weight percent,
NiO
0 to 200 PPM, and
MnO 2
0 to 0.6 weight percent,
wherein the glass composition has a redox ratio up to 0.55, and the colorant and property modifying portion further comprises Er 2 O 3 in a range of 0.5 to 2 weight percent or Nd 2 O 3 in a range of 0.5 to 2 weight percent.
13. The method according to claim 12 , wherein at least one of the following materials is present in glass composition in the recited amount: CoO from 2 to 35 PPM, Se from 3 to 14 PPM, Cr 2 O 3 from 10 to 300 PPM, CuO up to 0.3 weight percent, V 2 O 5 up to 0.2 weight percent, TiO 2 from 0.15 to 0.8 weight percent, NiO from 5 to 100 PPM, and MnO 2 from 0.1 to 0.5 weight percent.
14. A method of making a glass composition comprising: processing batch materials to form a glass composition comprising:
SiO 2
65 to 75 weight percent,
Na 2 O
10 to 20 weight percent,
CaO
5 to 15 weight percent,
MgO
0 to 5 weight percent,
Al 2 O 3
0 to 5 weight percent,
K 2 O
0 to 5 weight percent, and
BaO
0 to 1 weight percent,
and a colorant and property modifying portion comprising:
total iron
up to 0.02 weight percent,
CeO 2
0.05 weight percent to 1.5 weight percent,
CoO
0 to 50 PPM,
Se
0 to 15 PPM,
Cr 2 O 3
0 to 500 PPM,
CuO
0 to 0.5 weight percent,
V 2 O 5
0 to 0.3 weight percent,
TiO 2
0 to 1 weight percent,
NiO
0 to 200 PPM, and
MnO 2
0 to 0.6 weight percent,
wherein the glass composition has a redox ratio up to 0.55, and the colorant and property modifying portion further comprises Er 2 O 3 in a range of 0.5 to 1.5 weight percent or Nd 2 O 3 in a range of 0.5 to 2 weight percent, wherein the colorant and property modifying portion comprises at least: CoO from 5 to 25 PPM, Se from 5 to 12 PPM, Cr 2 O 3 from 20 to 200 PPM, CuO up to 0.1 weight percent, V 2 O 5 up to 0.1 weight percent, TiO 2 from 0.2 to 0.6 weight percent, NiO from 10 to 50 PPM or MnO 2 from 0.2 to 0.4 weight percent.
15. The method according to claim 14 , further comprising forming the glass composition into a flat sheet.