초록 ▼

The present invention provides a blue colored glass using a standard soda-lime-silica glass base composition and additionally iron and cobalt, and optionally chromium, as solar radiation absorbing materials and colorants. In particular, the blue colored glass includes about 0.40 to 1.0 wt. % total i

The present invention provides a blue colored glass using a standard soda-lime-silica glass base composition and additionally iron and cobalt, and optionally chromium, as solar radiation absorbing materials and colorants. In particular, the blue colored glass includes about 0.40 to 1.0 wt. % total iron, preferably about 0.50 to 0.75 wt. %, about 4 to 40 PPM CoO, preferably about 4 to 20 PPM, and 0 to 100 PPM Cr.sub.2 O.sub.3. The redox ratio for the glass of the present invention is greater than 0.35 up to about 0.60, and preferably between about 0.36 to 0.50. In one particular embodiment of the invention, the glass has a luminous transmittance of at least 55% and a color characterized by a dominant wavelength of 485 to 489 nanometers and an excitation purity of about 3 to 18 percent. In another embodiment of the invention, the glass has a luminous transmittance of at least 65% at a thickness of about 0.154 inches (3.9 mm) and a color characterized by a dominant wavelength of 485 to 492 nanometers and an excitation purity of about 3 to 18 percent.

대표청구항 ▼

[ What is claimed is:] [1.]1. A blue colored, infrared and ultraviolet radiation absorbing glass composition having a base glass portion comprising:SiO.sub.2 about 66 to 75 percent by weightNa.sub.2 O about 10 to 20 percent by weightCaO about 5 to 15 percent by weightMgO 0 to about 5 percent by weig

[ What is claimed is:] [1.]1. A blue colored, infrared and ultraviolet radiation absorbing glass composition having a base glass portion comprising:SiO.sub.2 about 66 to 75 percent by weightNa.sub.2 O about 10 to 20 percent by weightCaO about 5 to 15 percent by weightMgO 0 to about 5 percent by weightAl.sub.2 O.sub.3 0 to about 5 percent by weightK.sub.2 O 0 to about 5 percent by weight a solar radiation absorbing and colorant portion consisting essentially of:total iron about 0.40 to 1.0 percent by weightCoO about 4 to 40 PPMCr.sub.2 O.sub.3 0 to about 100 PPM, glass having 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.