Low-modulus ion-exchangeable glasses for enhanced manufacturability
AssigneeCorning Incorporated
InventorsBinghui Deng, Xiaoju Guo, Peter Joseph Lezzi
Life of this patent
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Abstract
Glass compositions are provided with low Young's modulus and compatibility with slot drawing techniques, due at least in part to liquidus viscosity and liquidus temperature. When ion-exchanged the resulting glass articles are capable of exhibiting a ratio of a peak compressive stress value in MPa to a Young's modulus value in GPa of 13.0 or more. The glass articles may have a peak compressive stress value in a range of 850 MPa to 1400 MPa. The glass articles are suitable for various high-strength applications, including cover glass applications that experience significant bending stresses during use, for example, cover glasses for flexible displays.
Claims14
A glass, comprising:
- greater than or equal to 69.0 mol % to less than or equal to 69.5 mol % SiO2;
- greater than or equal to 10.0 mol % to less than or equal to 10.5 mol % Al2O3;
- greater than or equal to 4.05 mol % to less than or equal to 5.25 mol % MgO;
- greater than or equal to 0.1 mol % to less than or equal to 1.1 mol % CaO;
- greater than or equal to 14.5 mol % to less than or equal to 15.8 mol % Na2O;
- and
- greater than or equal to 0.1 mol % to less than or equal to 0.2 mol % SnO2,
- wherein the glass has a liquidus viscosity greater than or equal to 1200 kP to less than or equal to 4000 kP, and
- wherein the glass has a Young's modulus greater than or equal to 71.1 GPa to less than or equal to 72 GPa.
Dependencies are inferred from the claim text.