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US 2022/0024807 A1Published application
Ion exchangeable borosilicate glass compositions and glass articles formed from the same
AssigneeCorning Incorporated
InventorsRobert Anthony Schaut, Wendell Porter Weeks, JR.
Life of this patent
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Abstract
A glass article may include SiO2, Al2O3, B2O3, at least one alkali oxide, and at least one alkaline earth oxide. The glass article may be capable of being strengthened by ion exchange. The glass article has a thickness t. The concentration(s) of the constituent components of the glass may be such that: 13≤0.0308543*(188.5+((23.84*Al2O3)+(−16.97*B2O3)+(69.10*Na2O)+(−213.3*K2O))+((Na2O−7.274)*(−7.3628)+(Al2O3−2.863)*(K2O−0.520)*(321.5)+(B2O3−9.668)*(K2O−0.520)*(−39.74)))/t.
Claims36
A glass article comprising:
- greater than or equal to 70 mol. % and less than or equal to 82 mol. % SiO2;
- greater than or equal to 1 mol. % and less than or equal to 6 mol. % Al2O3;
- greater than or equal to 3 mol. % and less than or equal to 16 mol. % B2O3;
- greater than or equal to 5 mol. % and less than or equal to 12 mol. % Na2O;
- greater than or equal to 0.3 mol % and less than or equal to 2.5 mol % K2O;
- greater than or equal to 6 mol. % and less than or equal to 12 mol. % R2O, where R is one or more of K, Li, and Na and wherein the ratio ((R2O—Al2O3)/B2O3) is greater than or equal to 0.7;
- and at least one alkaline earth oxide in an amount greater than or equal to 0 mol. % and less than or equal to 10 mol. % of alkaline earth oxide, wherein:
- the glass article is capable of being strengthened by ion exchange;
- the glass article has a thickness t;
- and
- the glass article satisfies the relationship, in mol. %, 13≤0.0308543*(188.5+423.84*Al2O3)+(−16.97*B2O3)+(69.10*Na2O)+(−213.3*K2O))+((Na2O−7.274)2*(−7.3628)+(Al2O3−2.863)*(K2O−0.520)*(321.5)+(B2O3−9.668)*(K2O−0.520)*(−39.74)))/t.
8 more elements
A glass article comprising:
- greater than or equal to 73 mol. % and less than or equal to 81 mol. % SiO2;
- greater than or equal to 3 mol. % and less than or equal to 6 mol. % Al2O3;
- greater than or equal to 4 mol. % and less than or equal to 11 mol. % B2O3;
- greater than or equal to 8 mol. % and less than or equal to 11 mol. % Na2O;
- greater than or equal to 0.30 mol. % and less than or equal to 1.5 mol. % K2O;
- greater than or equal to 0.10 mol. % and less than or equal to 6.00 mol. % MgO;
- and
- greater than or equal to 0.50 mol. % and less than or equal to 4.0 mol. % CaO, wherein:
- the glass article is capable of being strengthened by ion exchange;
- the glass article has a thickness t;
- and
- wherein the glass article satisfies the relationship, in mol. %, 13≤0.0308543*(188.5+((23.84*Al2O3)+(−16.97*B2O3)+(69.10*Na2O)+(−213.3*K2O))+((Na2O−7.274)2*(−7.3628)+(Al2O3−2.863)*(K2O−0.520)*(321.5)+(B2O3−9.668)*(K2O−0.520)*(−39.74)))/t.
9 more elements
Dependencies are inferred from the claim text.