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Ultraviolet/infrared absorbent low transmittance glass

  • US 6,784,129 B2
  • Filed: 10/03/2002
  • Issued: 08/31/2004
  • Est. Priority Date: 04/13/1998
  • Status: Expired due to Fees
First Claim
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1. An ultraviolet/infrared absorbent low transmittance glass consisting of a base glass and colorants, said base glass consisting essentially of:

  • 65 to 80 wt. % SiO2;

    0 to 5 wt. % Al2O3;

    0 to 10 wt. % MgO;

    5 to 15 wt. % CaO, wherein a total amount of MgO and CaO is between 5 and 15 wt. %;

    10 to 18 wt. % Na2O;

    0 to 5 wt. % K2O, wherein a total amount of Na2O and K2O is between 10 and 20 wt. %; and

    0 to 5 wt. % B2O3, and said colorants consisting essentially of;

    more than 0.95 wt. % and less than 1.2 wt. % total iron oxide (T-Fe2O3) expressed as Fe2O3;

    0.001-0.030 wt. % CoO; and

    0.003-0.2 wt. % NiO.

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