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Barium and/or strontium aluminosilicate crystal-containing glasses for flat panel display devices

  • US 4,634,683 A
  • Filed: 10/23/1985
  • Issued: 01/06/1987
  • Est. Priority Date: 10/23/1985
  • Status: Expired due to Term
First Claim
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1. A phase separated glass essentially free from alkali metal oxide consisting of extremely fine-grained crystals homogeneously dispersed in a glass matrix, said glass exhibiting transparency, an annealing point higher than 900°

  • C., a linear coefficient of thermal expansion over the temperature range of 25°

    -300°

    C. between about 30-40×

    10-7

    C., and consisting essentially, expressed in terms of mole percent on the oxide basis, of aboutSiO2 ;

    68-80Al2 O3 ;

    18-26BaO and/or SrO;

    2-6.

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