US2014309099A1PendingUtilityA1
Low iron, high redox ratio, and high iron, high redox ratio, soda-lime-silica glasses and methods of making same
Est. expiryApr 15, 2033(~6.7 yrs left)· nominal 20-yr term from priority
C03C 4/0092C03C 3/087C03C 3/095C03B 18/12C03C 4/02
56
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Claims
Abstract
A glass has a basic soda-lime-silica glass portion, and a colorant portion including total iron as Fe 2 O 3 selected from the group of total iron as Fe 2 O 3 in the range of greater than zero to 0.02 weight percent; total iron as Fe 2 O 3 in the range of greater than 0.02 weight percent to less than 0.10 weight percent and total iron as Fe 2 O 3 in the range of 0.10 to 2.00 weight percent; redox ratio in the range of 0.2 to 0.6, and tin and/or tin compounds, e.g. SnO 2 greater than 0.000 to 6.0 weight percent. In one embodiment of the invention, the glass has a tin side and an opposite air side, wherein the tin side of the glass is supported on a molten tin bath during forming of the glass. The tin concentration at the tin side of the glass is greater than, less than, or equal to the tin concentration in “body portion” of the glass. The “body portion” of the glass extending from the air side of the glass toward the tin side and terminating short of the tin side of the glass.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A glass having a tin side and an opposite air side, wherein the tin side of the glass is supported on a molten tin bath during forming of the glass, the glass, comprising:
a basic soda-lime-silica glass portion, and a colorant portion, comprising:
total iron as Fe 2 O 3 selected from the group of total iron as Fe 2 O 3 in the range of greater than zero to 0.02 weight percent; total iron as Fe 2 O 3 in the range of greater than 0.02 weight percent to less than 0.10 weight percent and total iron as Fe 2 O 3 in the range of 0.10 to 2.00 weight percent;
redox ratio 0.2 to 0.6, and
tin and/or tin containing compounds providing tin in an amount within the range of greater than 0.005 to 5.0 weight percent,
wherein the tin and/or the tin containing compound provides a concentration of fin in the air side of the glass that is equal to or different than the tin in the tin side of the glass.
2 . The glass according to claim 1 wherein the concentration of tin is uniform from the air side of the glass toward the tin side of the glass and the tin side of the glass has a higher concentration of tin than the air side.
3 . The glass according to claim 1 wherein the basic soda-lime-silica glass portion comprises:
SiO 2
65-75
wt. %
Na 2 O
10-20
wt. %
CaO
5-15
wt. %
MgO
0-5
wt. %
Al 2 O 3
0-5
wt. %
K 2 O
0-5
wt. %; and
total iron as Fe 2 O 3 selected from total iron as Fe 2 O 3 in the range of greater than zero to 0.02 weight percent.
4 . The glass according to claim 3 , wherein the colorant portion comprises CoO 0-5 parts per million; Nd 2 O 3 in the range of 0-0.1 weight percent; and
CuO 0-0.03 weight percent, wherein the colorant portion provides the glass with a total solar energy transmission (“TSET”) of greater than 0% and equal to or less than 5%, a total solar energy reflection (“TSER”) of greater than 3% and equal to or less than 7%, and a total solar energy absorption (“TSEA”) of greater than 90% and equal to or less than 97%, and selected ones of the TSET, TSER, and TSEA are measured over a wavelength range of 300 to 2500 nanometers (“nm”) at a glass thickness in the range of 3.6-4.1 millimeters (“mm”).
5 . The glass according to claim 1 wherein the basic soda-lime-silica glass portion comprises:
SiO 2
65-75
wt. %
Na 2 O
10-20
wt. %
CaO
5-15
wt. %
MgO
0-5
wt. %
Al 2 O 3
0-5
wt. %
K 2 O
0-5
wt. %; and
total iron as Fe 2 O 3 selected from total iron as Fe 2 O 3 in the range of greater than 0.02 weight percent to less than 0.10 weight percent, and the tin and/or tin compound at the air side has a concentration of tin in the range of 0.1-3 wt. %.
6 . The glass according to claim 1 wherein the basic soda-lime-silica glass portion comprises:
SiO 2
65-75
wt. %
Na 2 O
10-20
wt. %
CaO
5-15
wt. %
MgO
0-5
wt. %
Al 2 O 3
0-5
wt. %
K 2 O
0-5
wt. %; and
total iron as Fe 2 O 3 selected from total iron as Fe 2 O 3 in the range of 0.10 to 2.00 weight percent and the tin and/or tin compound at the air side has a concentration of tin in the range of 0.1-5 wt. %.
7 . The glass according to claim 6 wherein the glass comprises:
Ingredient
Ingredient in wt. %
SiO 2
73.11
Na 2 O
13.65
K 2 O
0.01
CaO
8.68
MgO
3.16
A l2 O 3
0.03
Fe 2 O 3
0.0097
SrO
0.02
SO 3
0.2
ZrO 2
0.001
FeO/Fe 2 O 3
0.505
SnO 2
0.111
wherein the glass has an LTA of at least 91.23%; a dominant wavelength of 496.66 nanometers; an excitation purity of 0.14%; a TSUV of 89.07%; a TSIR of 87.82% and a TSET of 89.43% at a thickness of 5.6 mm.
8 . The glass according to claim 6 wherein the glass has water in the range of 200 to 700 parts per million.
9 . The glass according to claim I wherein the basic soda-lime-silica glass portion comprises:
SiO 2
65-75
wt. %
Na 2 O
10-20
wt. %
CaO
5-15
wt. %
MgO
0-5
wt. %
Al 2 O 3
0-5
wt. %
K 2 O
0-5
wt. %; and
the colorant portion comprises:
total iron as Fe 2 O 3 in the range of 0.01 to 2.0 weight percent; and SnO 2 in the range of 0.005 to 5.0.
10 . The glass according to claim 9 wherein the glass has a redox of greater than 0.35 up to about 0.60, a luminous transmittance of at least 55 percent, and a color characterized by a dominant wavelength of 485 to 489 nanometers and an excitation purity of about 3 to 18 percent, and wherein the glass has a total solar ultraviolet transmittance of about 60 percent or less, a total solar infrared transmittance of about 35 percent or less and a total solar energy transmittance of about 55 percent or less at a thickness of about 0.154 inches.
11 . The glass according to claim 10 wherein the glass comprises:
Ingredients
Ingredients in wt. %
SiO 2
71.83
Na2O
13.94
K2O
0.07
CaO
8.73
MgO
3.8
Al2O3
0.07
Fe2O3
0.515
SrO
0.003
SO3
0.18
ZrO2
0.0012
FeO/Fe 2 O 3
0.559
SnO 2
0.828
wherein the glass has an LTA of at 65.19%; a dominant wavelength of 487.95 nanometers; an excitation purity of 13.13%; a ISM of 48.46%; a TSIR of 8.25% and a TSET of 34.59% at a thickness of 5.6 mm.
12 . The glass according to claim 11 wherein the glass has water in the range of 200 to 700 parts per million.
13 . A method of making a glass, comprising:
providing a basic soda-lime-silica glass portion, and a colorant portion, the colorant portion, comprising:
total iron as Fe 2 O 3 selected from the group of total iron as Fe 2 O 3 in the range of greater than zero to 0.02 weight percent;
total iron as Fe 2 O 3 in the range of greater than 0.02 weight percent to less than 0.10 weight percent and total iron as Fe 2 O 3 in the range of 0.10 to 2.00 weight percent, and
tin and/or tin containing compounds providing tin in an amount within the range of greater than 0.005 to 5.0 weight percent,
melting the glass portion and the colorant portion to provide a pool of molten glass;
flowing the molten glass onto a molten tin bath;
moving the molten glass on the surface of the molten tin bath, while controllably cooling the glass and applying forces to the glass to provide a glass of a desired thickness;
removing the glass from the molten tin bath, wherein the tin and/or tin containing compounds concentration at the tin side of the glass may be greater than the Sn concentration in body portion of the glass, the body portion of the glass extending from the air side of the glass and terminating short of the tin side of the glass.
14 . The method according to claim 13 wherein the total iron as Fe 2 O 3 is selected from the group of total iron as Fe 2 O 3 in the range of greater than zero to 0.02 weight percent.
15 . The method according to claim 13 wherein the total iron as Fe 2 O 3 is in the range of greater than 0.02 weight percent to less than 0.10 weight percent.
16 . The method according to claim 13 wherein the total iron as Fe 2 O 3 is in the range of 0.10 to 2.00 weight percent.
17 . The method according to claim 13 wherein tin and tin containing compounds are added to the glass batch materials and/or molten glass by an act selected from selected from (1) adding SnO 2 and/or tin sulfate (“SnS”) to the glass batch materials as a dry powder; (2) adding pellets of SnO 2 to the glass batch materials; (3) adding glass cullet to the batch material, the cullet having a coating of SnO 2 over and/or on a glass surface and/or glass Gullet having tin and/or tin containing compounds within the body of the glass; (4) adding ground particles of tin and/or tin containing compounds, e.g. but not limited to Sn, SnO 2 , and SnS to the glass batch materials; (6) mixing dry SnO 2 with a liquid to make a slurry and adding the slurry to the batch materials; (7) bubbling tin containing halogen gas into the molten glass, and (8) adding organo-tin compounds and organo-tin compounds containing halogens.
18 . The method according to claim 13 wherein the glass has a redox of greater than 0.35 up to about 0.60, a luminous transmittance of at least 55 percent, and a color characterized by a dominant wavelength of 485 to 489 nanometers and an excitation purity of about 3 to 18 percent, and wherein the glass has a total solar ultraviolet transmittance of about 60 percent or less, a total solar infrared transmittance of about 35 percent or less and a total solar energy transmittance of about 55 percent or less at a thickness of about 0.154 inches.
19 . The method according to claim 13 wherein the glass has water in the range of 200 to 700 parts per million.
20 . The method according to the method of claim 13 wherein the glass has an LTc of 90.8%; a dominant wavelength of 490.50 nanometers; an excitation purity of 0.27%; a TSUV of 88.4%; a TSIR of 86.4% and a TSET od 88.5% and the radiation transmittance data is based on TSUV 300-390 nanometers; LTc 400-770 nanometers and TSIR 800-2100 nanometers at a standard thickness of 5.5 mm.Join the waitlist — get patent alerts
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