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Dark neutral gray glass composition with low transmittance, and glass formed therefrom

  • US 9,120,695 B2
  • Filed: 08/02/2012
  • Issued: 09/01/2015
  • Est. Priority Date: 08/05/2011
  • Status: Active Grant
First Claim
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1. A dark, neutral gray-colored, low-transmittance glass composition with low color purity, comprising:

  • as colorant ingredients, 1.4 to 2 parts by weight of total Fe2O3, 0.02 to 0.035 parts by weight of CoO and 0.0015 to 0.004 parts by weight of Se, based on 100 parts by weight of a base glass composition,wherein FeO content in the total Fe2O3 is 10 to 30% by weight,the weight ratio of CoO to Se is from 6.5;

    1 to 14;

    1,the glass composition does not comprise an oxide of rare-earth element selected from lanthanides consisting of Ce, Sc, Y, La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, as an oxidant and a colorant ingredientthe glass composition does not comprise Cr, andthe glass composition has an ultraviolet ray transmittance (Tuv) of 2% or less, measured for a reference thickness of 4 mm.

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