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US 9,809,487 B2Granted
Glasses having improved toughness and scratch resistance
AssigneeCorning Incorporated
InventorsMatthew John Dejneka, Adam James Ellison, Sinue Gomez, Robert Michael Morena
Life of this patent
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Abstract
A silicate glass that is tough and scratch resistant. The toughness is increased by minimizing the number of non-bridging oxygen atoms in the glass. In one embodiment, the silicate glass is an aluminoborosilicate glass in which −15 mol %≦(R2O+R′O—Al2O3—ZrO2)—B2O3≦4 mol %, where R is one of Li, Na, K, Rb, and Cs, and R′ is one of Mg, Ca, Sr, and Ba.
Claims21
A silicate glass, the silicate glass being ion exchangeable and comprising:
- 62-70 mol % SiO2;
- 0-18 mol % Al2O3;
- >0-10 mol % B2O3;
- 0-15 mol % Li2O;
- 6-20 mol % Na2O;
- 0-18 mol % K2O;
- >0-17 mol % MgO;
- and ZrO2, wherein 16 mol %≦Al2O3 +B2O3 +ZrO2≦29 mol %;
- 14 mol %≦R2O +R′O≦25 mol %;
- and -15 mol %≦(R2O +R′O—Al2O3—ZrO2)—B2O3≦4 mol %, where R is at least one of Li, Na, K, Rb, and Cs, and R′ is at least one of Mg, Ca, Sr, and Ba.
7 more elements
A silicate glass, the silicate glass being ion exchangeable and comprising 62-70 mol % SiO2;
- 0-18 mol % Al2O3;
- >0-10 mol % B2O3;
- 6-20 mol % Na2O, 0-15 mol % Li2O;
- 0-18 mol % K2O;
- >0-17 mol % MgO;
- and SnO2, wherein 16 mol %≦Al2O3+B2O3 +ZrO2≦29 mol %;
- and −15 mol %≦(R2O +R′O—Al3O3 —ZrO2)—B2O3≦4 mol %, where R is at least one of Li, Na, K, Rb, and Cs, and R′ is at least one of Mg, Ca, Sr, and Ba.
4 more elements
Dependencies are inferred from the claim text.