| 摘要 |
The present invention provides a bronze colored, infrared and ultraviolet absorbing glass composition having a luminous transmittance of up to 60 percent. The glass uses a standard soda-lime-silica glass base composition and additionally iron and selenium, and optionally cobalt, as infrared and ultraviolet radiation absorbing materials and colorants. The glass of the present invention has a luminous transmittance (LTA) of up to 60 percent and its color is characterized by a dominant wavelength in the range of 560 to 590 nanometers and an excitation purity of 12 to 75 % at a thickness of 0.160 inches (4.06 mm). In one embodiment of the invention, the glass composition of a bronze colored, infrared and ultraviolet radiation absorbing soda-lime-silica glass article includes a solar radiation absorbing and colorant portion consisting essentially of 0.7 to 2.2 percent by weight total iron, 0.15 to 0.5 percent by weight FeO, 3 to 100 PPM Se, and optionally up to 200 PPM CoO, and preferably 1.1 to 1.4 percent by weight total iron, 0.24 to 0.36 percent by weight FeO, 20 to 45 PPM Se, and 0 to 70 PPM CoO.
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