US 2026/0145989 A1Published application

Ion exchangeable glass articles having improved mechanical durability

AssigneeCorning Incorporated

InventorsTimothy James Kiczenski, Peter Joseph Lezzi, Jonathan David Pesansky

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Abstract

A glass article includes SiO2, Al2O3, and Na2O. B2O3+P2O5 may be greater than 0 mol % to 10 mol %. R2O may be from 10 mol % to 20 mol %. R2O—Al2O3 may be from 0 mol % to 10 mol %. RO may be from 0 mol % to 10 mol %. (R2O+RO)—(Al2O3+B2O3) from −5 mol % to 10 mol %. The glass article may include a ratio of peak compressive stress to Young's modulus greater than or equal to 13, after the glass article is ion exchanged in a 100% KNO3 salt bath at 410° C. for 30 minutes; a Knoop scratch threshold greater than 5 N; a difference between a zirconium breakdown temperature and a liquidus temperature at a 35 kP temperature greater than or equal to −35° C.; and a 200 P temperature less than or equal to 1720° C.

Claims20

Dependent claims

A glass article comprising:

greater than or equal to 58 mol % and less than or equal to 75 mol % SiO2;
greater than or equal to 10 mol % and less than or equal to 20 mol % Al2O3;
greater than or equal to 0 mol % and less than or equal to 8 mol % B2O3;
greater than or equal to 0 mol % and less than or equal to 6 mol % P2O5;
and
greater than or equal to 10 mol % and less than or equal to 20 mol % Na2O, wherein
B2O3+P2O5 is greater than 0 mol % and less than or equal to 10 mol %;
R2O is greater than or equal to 10 mol % and less than or equal to 20 mol %, wherein R2O is the sum of Na2O, Li2O, and K2O;
R2O—Al2O3 is greater than or equal to 0 mol % and less than or equal to 10 mol %;
RO is greater than or equal to 0 mol % and less than or equal to 10 mol %, wherein RO is the sum of MgO, CaO, SrO, and ZnO;
(R2O+RO)—(Al2O3+B2O3) is greater than or equal to −5 mol % and less than or equal to 10 mol %;
and
the glass article comprises:
a peak compressive stress (CS) and a Young's modulus (E), a ratio of the CS to the E being greater than or equal to 13, after the glass article is ion exchanged in a 100% KNO3 salt bath at 410° C. for 30 minutes;
a Knoop scratch threshold greater than 5 N;
a zirconium breakdown temperature (TZr) and a 35 kP temperature (T35k), wherein a difference between the TZr and the T35k being greater than or equal to −35° C.;
and
a 200 P temperature (T200) less than or equal to 1720° C.

15 more elements

Dependencies are inferred from the claim text.