Neutral gray-colored infrared and ultraviolet radiation absorbin

Details Neutral gray-colored infrared and ultraviolet radiation absorbin Neutral gray-colored infrared and ultraviolet radiation absorbin

1993-03-17

1994-11-15

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 72, 501 70, 501904, 501905, 501 69, C03C 3078, C03C 3087, C03C 402, C03C 408

Patent

active

053648200

ABSTRACT:
An infrared and ultraviolet radiation absorbing glass suitable for use in building and vehicle windows, which comprises, on a weight basis, 68-74% of SiO.sub.2, 0.1-3.0% of Al.sub.2 O.sub.3, 8-11% of CaO, 2-4.5% of MgO, 11.5-16% of Na.sub.2 O, 0.5-3.0% of K.sub.2 O, 0.1-0.4% of SO.sub.3, 0.10-0.55% of total iron expressed as Fe.sub.2 O.sub.3, 0.2-0.6% of CeO.sub.2, 15-35 ppm of CoO and 2-18 ppm of Se. In the glass the ratio of ferrous iron to ferric iron is in the range from 0.17 to 0.55. The glass has a neutral grayish tint and is well balanced in visible light transmittance, infrared radiation absorption and ultraviolet radiation absorption, and a sheet of the glass can be easily tempered by a conventional method.

REFERENCES:
patent: 3296004 (1967-01-01), Duncan
patent: 3723142 (1973-03-01), Kato et al.
patent: 4104076 (1978-08-01), Pons
patent: 4792536 (1988-12-01), Pecoraro et al.
patent: 5023210 (1991-06-01), Krumwiede et al.
Volf. Chemical Approach to Glass, p. 360, 1984.
Derwent Publications Ltd., London, GB; AN 81-78952D & JP-B-56 041 579 (Nippon Sheet Glass KK).
Derwent Publications Ltd., Longon, GB; AN 75-36593W & JP-B-55 023 221 (Asahi Glass KK).

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