Claims
- 1. An ultraviolet/infrared absorbent low transmittance glass and consisting of base glass and colorants, said base glass comprising:
65 to 80 wt. % SiO2; 0 to 5 wt. % A12O3; 0 to 10 wt. % MgO; 5 to 15 wt. % CaO wherein a total amount of MgO and CaO is between 5 and 15 wt. %; 10 to 18 wt. % Na2O; 0 to 5 wt. % K2O wherein a total amount of Na2O and K2O is between 10 and 20 wt. %; and 0 to 5 wt. % B2O3, and said colorants comprising: more than 0.95 wt. % and less than 1.2 wt. % total iron oxide (T-Fe2O3) expressed as Fe2O3; 0.001-0.0180 wt. % CoO; 0.0001-0.0008 wt. % Se; and 0.003-0.2 wt. % NiO.
- 2. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein T-Fe2O3 is greater than 0.95 wt. % and not greater than 1.1 wt. %.
- 3. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein CoO is between 0.001 wt. % and 0.0175 wt. %.
- 4. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein Se is between 0.0001 wt. % and 0.0004 wt. %.
- 5. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein NiO is equal to or more than 0.003 wt. % and less than 0.05 wt. %.
- 6. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein NiO is between 0.05 wt. % and 0.2 wt. %.
- 7. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein said colorant further comprises CeO2 of no greater than 2 wt. % and/or TiO2 of no greater than 2 wt. %.
- 8. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein FeO expressed as Fe2O3 is between 15 wt. % and 40 wt. % of T-Fe2O3.
- 9. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein the glass with a thickness between 2 mm and 5 mm has a visible light transmittance (YA) by the C.I.E. illuminant “A” in a range from 10% to 50%, a solar energy transmittance of not greater than 30%, and an ultraviolet transmittance of not greater than 12% specified by ISO.
- 10. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein the glass has a color defined by the following C.I.E.L.A.B. coordinates −8≦a* ≦−2 and −2≦b*≦4, and a grayish green shade. 11. An ultraviolet/infrared absorbent low transmittance glass as claimed in claim 1, wherein the glass is reinforced by air blast cooling.
Priority Claims (1)
Number |
Date |
Country |
Kind |
H10-101233 |
Apr 1998 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] [001] This is a continuation-in-part application of patent application Ser. No. 266,628 filed on Mar. 11, 1999.
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
09266628 |
Mar 1999 |
US |
Child |
09817119 |
Mar 2001 |
US |
Parent |
09266628 |
Mar 1999 |
US |
Child |
09817119 |
Mar 2001 |
US |