Glass composition for production of glazing absorbing ultraviolet and infrared radiation
AssigneeSaint-Gobain Glass France
InventorLaurent Teyssedre
Life of this patent
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Abstract
Glass composition intended for the manufacture of windows that absorb ultraviolet and infrared radiation, comprising the oxides below, in contents varying within the following limits by weight: SiO2 65-80% Al2O3 0-5% B2O3 0-5% CaO 5-15% MgO 0-2% Na2O 9-18% K2O 0-10% BaO 0-5% characterized in that it additionally comprises the absorbent agents below, in contents varying within the following limits by weight: Fe2O3 (total iron) 0.7 to 1.6% CeO2 0.1 to 1.2% TiO2 0 to 1.5% the glass having a redox factor of 0.23 or less and containing no tungsten oxide WO3.
Claims16
A glass composition intended for the manufacture of windows that absorb ultraviolet and infrared radiation, comprising (i) the following oxides in contents varying within the following limits by weight:
- SiO2
- 65-80%
- Al2O3
- 0-5%
- B2O3
- 0-5%
- CaO
- 5-15%
- MgO
- 0-2%
- Na2O
- 9-18%
- K2O
- 0-10%
- BaO
- 0-5%.
- and (ii) the following absorbent agents in contents varying within the following limits by weight:
- Fe2O3 (total iron)
- 0.7 to 1.6%
- CeO2
- 0.1 to 1.2%
- TiO2
- 0 to 1.5%.
- said glass composition having a redox factor of 0.19 or less and containing no tungsten oxide WO3, wherein Tuv does not exceeding 14% for a thickness varying from 3 to 5 mm.
Dependencies are inferred from the claim text.