Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1997-02-12
1998-11-03
Group, Karl
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
501 70, C03C 3087
Patent
active
058308121
ABSTRACT:
The present invention provides a green colored glass using a standard soda-lime-silica glass base composition and additionally iron, cerium, chromium and, optionally, titanium as infrared and ultraviolet radiation absorbing materials and colorants. It is preferred that the glass have a green color characterized by a dominant wavelength in the range of about 500 to 565 nanometers with an excitation purity of no higher than about 5% and include about 0.50 to 1.0 wt. % total iron, about 0.26 to 0.65 wt. % Fe.sub.2 O.sub.3, about 0.05 to 3 wt. % CeO.sub.2, 0 to about 2 wt. % TiO.sub.2, and about 20 to 650 PPM Cr.sub.2 O.sub.3. The redox ratio for the glass is maintained between about 0.20 to 0.55. The glass compositions disclosed in the present invention have an LTA of at least about 65%, preferably at least 70%, a TSUV of no greater than 38%, preferably no greater than 35%, a TSIR of no greater than about 35%, preferably no greater than about 30%, and a TSET of no greater than about 50%, preferably, no greater than about 48%. In addition, the glass preferably has an ISO UV of no greater than about 15%, preferably no greater than about 10%,
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Calabrese Andrew
Shelestak Larry J.
Group Karl
PPG Industries Inc.
Siminerio Andrew C.
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