| 摘要 |
The invention is a soda-lime-silica glass composition which is blue in color and having improved UV and IR absorption. The spectral properties of the blue glass at a 4.0 mm. Thickness include: 477-494 dominant wavelength and 6-40% purity of excitation. The blue glass composition, by weight, comprises a base glass composition of: 68 to 75% SiO2, 10 to 18% Na2O, 5 to 15% CaO, 0 to 10% MgO, 0 to 5% Al2O3, and 0 to 5% K2O, where CaO+MgO is 6 to 15% and Na2O+K20 is 10 to 20%; and colorants consisting essentially of: 0.4 to 2.0% total iron oxide as Fe2O3, 0.15 to 2.00% manganese oxide as MnO2; 0.005 to 0.025% cobalt oxide as Co, and 0 to 1.00% titanium oxide as TiO2. The glass is useful for automotive or architectural applications. It preferably is made by a nitrite-free method which may desirably involve the use of a reducing agent during melting operations.
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