Low iron, high redox ratio, and high iron, high redox ratio, soda-lime-silica glasses and methods of making same
A glass has a basic soda-lime-silica glass portion, and a colorant portion, the colorant portion including total iron as Fe 2 O 3 in the range of at least 0.10 to no more than 2.00 weight percent, a redox ratio in the range of 0.35 to 0.6, and tin metal providing tin in an amount within the range of greater than 0.005 to 5.0 weight percent; the glass product has a tin side and an opposite air side, said tin side of the glass having a higher concentration of tin than the air side, the air side having a uniform concentration of tin from the air side of the glass product towards the tin side of the glass product.
1. A glass, comprising:
a basic soda-lime-silica glass portion, wherein the basic soda-lime-silica glass portion comprises:
SiO 2
65-80 wt. %
Na 2 O
10-20 wt. %
CaO
5-15 wt. %
MgO
0-8 wt. %
Al 2 O 3
0-5 wt. %
K 2 O
0-5 wt. %;
and
a colorant portion, the colorant portion comprising:
total iron as Fe 2 O 3 in the range of at least 0.10 to no more than 2.00 weight percent, a redox ratio in the range of 0.35 to 0.6, and tin in an amount within the range of 0.4 to 3.0 weight percent;
wherein the glass product has a tin side and an opposite air side, said tin side of the glass having a higher concentration of tin than the air side, the air side having a uniform concentration of tin from the air side of the glass product towards the tin side of the glass product.
2. The glass according to claim 1 wherein the glass comprises:
Ingredient
Ingredient in wt. %
SiO 2
71.83
Na 2 O
13.94
K 2 O
0.07
CaO
8.73
MgO
3.8
Al 2 O 3
0.07
Fe 2 O 3
0.515
SrO
0.003
SO 3
0.18
ZrO 2
0.0012
FeO/Fe 2 O 3
0.559
SnO 2
0.828.
3. The glass according to claim 1 wherein the glass comprises:
Ingredient
Ingredient in wt. %
SiO 2
71.89
Na 2 O
13.72
CaO
8.49
MgO
3.80
Al 2 O 3
0.14
Fe 2 O 3
0.468
SO 3
0.193
SnO 2
1.23.
4. The glass according to claim 1 , wherein the colorant comprises 0.40 to 1.0 wt. % total iron as Fe 2 O 3 .
5. The glass according to claim 1 , wherein the colorant comprises 0.50 to 0.75 wt. % total iron as Fe 2 O 3 .
6. The glass according to claim 1 , wherein the colorant further comprises greater than 0 to 0.5 weight percent Nd 2 O 3 ; greater than 0 to 80 ppm CoO; greater than 0 to 1 weight percent Cr2O3; greater than 0 to 1 weight percent TiO2; greater than 0 to 1 weight percent CeO2, or greater than 0 to 1 weight percent MnO2.
7. The glass according to claim 1 , wherein the colorant further comprises 4 to 40 ppm CoO.
8. The glass according to claim 1 , wherein the colorant further comprises 4 to 20 ppm CoO.
9. The glass according to claim 1 wherein the glass batch has a redox ratio in the range of greater than 0.35 up to 0.60.
10. The glass according to claim 1 , wherein the redox ratio is in the range of 0.4 to 0.6.
11. The glass according to claim 1 wherein the tin at the air side has a concentration of tin in the range of greater than 0.005 to 5.0 weight percent.
12. The glass according to claim 1 , wherein the glass comprises tin oxide in the range of greater than 0 to 1.23 weight percent.
13. The glass according to claim 1 the glass product has an LTA of at least 65.19%; a dominant wavelength of at least 485 nanometers and not more than 490 nanometers; an excitation purity of at least 10% and not more than 15%; a TSUV of at least 45% and not more than 50%; a TSIR of at least 7% and not more than 9% and a TSET of at least 32% and not more than 36% at a thickness of 5.6 mm.
14. The glass according to claim 1 comprising a luminous transmittance of at least 55%.
15. The glass according to claim 1 , wherein the glass has water in the range of 200 to 700 parts per million.
16. The glass according to claim 1 , wherein the glass has water in the range of 425 to 600 parts per million.
17. The glass according to claim 1 , wherein the glass has water in the range of 200 to 400 parts per million.