Ultraviolet/infrared absorbent low transmittance glass

Details Ultraviolet/infrared absorbent low transmittance glass Ultraviolet/infrared absorbent low transmittance glass

1997-09-30

1999-09-14

Marcheschi, Michael

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 70, 501904, 501905, C03C 3087

Patent

active

059522550

ABSTRACT:
The ultraviolet/infrared absorbent low transmittance glass has an almost neutral greenish color, middle visible light transmittance, low total solar energy transmittance, and low ultraviolet transmittance, and is suitable for a window of a vehicle or a building and capable of preventing degradation and discoloration of interior materials and protecting privacy. The glass consists of base glass including: 65 to 80 wt. % SiO.sub.2 ; 0 to 5 wt. % Al.sub.2 O.sub.3 ; 0 to 10 wt. % MgO; 5 to 15 wt. % CaO wherein a total amount of MgO and CaO is between sand 15 wt. %; 10 to 20 wt. % Na.sub.2 O; 0 to 5 wt. % K.sub.2 O wherein a total amount of Na.sub.2 O and K.sub.2 O is between 10 to 20 wt. %; and 0 to 5 wt. % B.sub.2 O.sub.3, and colorants including: 0.7 to 0.95 wt. % total iron oxide (T-Fe.sub.2 O.sub.3) expressed as Fe.sub.2 O.sub.3 ; 1.1 to 2.3% TiO.sub.2, 0 to 2.0% CeO.sub.2, 0.013 to 0.025 wt. % CoO; 0 to 0.0008% Se; and 0.01 to 0.07% NiO. A visible light transmittance (YA) in a range from 25% to 45% and a total solar energy transmittance is in a range from 10% to 40% at a thickness between 3.1 and 5 mm.

REFERENCES:
patent: 5264400 (1993-11-01), Nakaguchi et al.
patent: 5308805 (1994-05-01), Baker et al.
patent: 5318931 (1994-06-01), Nakaguchi et al.
patent: 5344798 (1994-09-01), Morimoto et al.
patent: 5346867 (1994-09-01), Jones et al.
patent: 5411922 (1995-05-01), Jones

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