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Alkali-free aluminoborosilicate glass and its use

  • US 5,770,535 A
  • Filed: 01/31/1997
  • Issued: 06/23/1998
  • Est. Priority Date: 02/02/1996
  • Status: Expired due to Fees
First Claim
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1. Alkali-free aluminoborosilicate glass of the following composition, in % by weight based on oxide:

  • SiO2 52-62B2 O3 4-14Al2 O3 12-20MgO 0-8CaO 4-11BaO 0-2ZnO 2-8ZrO2 0-2SaO2 052 0-2.

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