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Refractory glass composition

  • US 2,961,328 A
  • Filed: 12/02/1958
  • Issued: 11/22/1960
  • Est. Priority Date: 12/02/1958
  • Status: Expired due to Term
First Claim
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1. A REFRACTORY GLASS COMPOSITION FOR HIGH TEMPERATURE APPLICATION WHICH IS RESISTANT TO DAMAGE BY EXPOSURE TO HIGH ENERGY PARTICLES CONSISTING ESSENTIALLY OF ABOUT 54 TO 65% SILICON DIOXIDE, ABOUT 15 TO 22% ALUMINUM OXIDE, ABOUT 7 TO 30% CALCIUM AND MAGNESIUM OXIDES IN ESSENTIALLY THE DOLOMITIC LIMESTONE RETIO, AND A SIGNIFICANT AMOUNT OF A CONSTITUENT SELECTED FROM THE FOLLOWING:

  • ABOUT UP TO 10% BARIUM OXIDE, ABOUT UP 10% LEAD OXIDE, ABOUT UP TO 3% OXIDE, ABOUT UP TO 3% ZINC OXIDE, ABOUT UP 3% TITANIUM DIOXIDE, ABOUT UP TO 3% SODIUM OXIDE AND ABOUT UP TO 3% POTASSIUM OXIDE, THE SAID GLASS COMPOSITION HAVING A COEFFICIENT OF THERMAL EXPANSION (0*300*C.), RANGING FROM ABOUT 26 TO 60X10-7 CM. PER CM. PER *C., A LIQUIDUS TEMPERATURE RANGING FROM ABOUT 1200* TO 1460*C. AND A SOFTENING POINT TEMPERATURE NOT LESS THAT 950*C.

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