Patent ID: 11964907
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. A glass comprising a plurality of components, the glass having a composition of the components comprising
greater than or equal to 40.5. mol. % and less than or equal to 53.0 mol. % SiO2,
greater than or equal to 23.0 mol. % and less than or equal to 43.0 mol. % MgO,
greater than or equal to 8.0 mol. % and less than or equal to 12.1 mol. % Al2O3,
greater than or equal to 0.0 mol. % and less than or equal to 18.0 mol. % (FeO+2*Fe2O3),
greater than or equal to 0.0 mol. % and less than or equal to 7.5 mol. % FeO,
greater than or equal to 0.0 mol. % and less than or equal to 7.0 mol. % Li2O,
greater than or equal to 0.2 mol. % and less than or equal to 2.1 mol. % TiO2,
greater than or equal to 0.0 mol. % and less than or equal to 0.9 mol. % B2O3,
greater than or equal to 0.0 at. % and less than or equal to 1.0 at. % F,
greater than or equal to 2.2 mol. % and less than or equal to 4.4 mol. % ZrO2,
a sum of ZrO2+HfO2+TiO2 greater than or equal to 1.5 mol. %,
a sum of Na2O+K2O greater than or equal to 0.0 mol. % and less than or equal to 18.0 mol. % and
a sum of CaO+SrO greater than or equal to 0 mol. % and less than or equal to 1.45 mol. %;
optionally comprising one or more components selected from monovalent metal oxides R2O, divalent metal oxides RO, MnO2, P2O5, La2O3 and Y2O3,
greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % K2O,
greater than or equal to 0.0 mol. % and less than or equal to 4.4 mol. % Na2O,
greater than or equal to 0.0 mol. % and less than or equal to 1.5 mol. % SrO,
greater than or equal to 0.0 mol. % and less than or equal to 7.0 mol. % BaO,
greater than or equal to 0.0 at. % and less than or equal to 1.5 at. % Y2O3,
greater than or equal to 0.0 mol. % and less than or equal to 10.0 mol. % ZnO,
wherein the glass satisfies the conditions:

(SiO2-Al2O3-R2O)[mol. %]≤38.5; and

(MgO/RO)[mol. %]≥0.725; and

{Pd-[3.38-0.016*(SiO2-Al2O3-R2O)]}<0.000,, where Pd is a predicted value of density at room temperature, dRT[g/cm3], calculated from the glass composition in terms of mol. % of the components according to the Formula: Pd=2.887−[(0.0072823*SiO2)+(0.0051002*MgO)−(0.0018062*Al2O3)+(0.025136*ZrO2)−(0.0014332*K2O)+(0.0092523*TiO2)+(0.020819*ZnO)+(0.036644*BaO)+(0.017682*FeO)+(0.0071329*MnO)+(0.0091327*MnO2)+(0.011077*CaO)+(0.024475*SrO)+(0.044972*Cs2O)+(0.00053066*Li2O)−(0.012312*P2O5)+(0.083043*La2O3)−(0.0074883*B2O3)+(0.059360*Y2O3)+(0.069507*PbO)+(0.056896*HfO2)].