ULTRA-THIN STRENGTHENED GLASSES
First Claim
Patent Images
1. A glass, the glass comprising at least about 65 mol % SiO2 and at least about 6 mol % Na2O, the glass having a thickness of less than 400 μ
- m and a difference between a first coefficient of thermal expansion and a second coefficient of thermal expansion Δ
CTE of less than 107×
107°
C.−
1, wherein the first coefficient of thermal expansion is the coefficient of thermal expansion of the glass in its liquid state and the second coefficient of thermal expansion is the coefficient of thermal expansion of the glass in its glassy state at room temperature.
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Abstract
Glass compositions having properties that are optimized for forming ultra-thin (<0.4 mm) articles and for applications requiring ultra-thin glass. These properties include both forming-related properties such as the coefficients of thermal expansion (CTE) of both the liquid and glassy state of the glass, liquidus viscosity, and those properties affecting the mechanical performance of the glass (compressive stress, depth of layer, elastic or Young'"'"'s modulus).
72 Citations
20 Claims
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1. A glass, the glass comprising at least about 65 mol % SiO2 and at least about 6 mol % Na2O, the glass having a thickness of less than 400 μ
- m and a difference between a first coefficient of thermal expansion and a second coefficient of thermal expansion Δ
CTE of less than 107×
107°
C.−
1, wherein the first coefficient of thermal expansion is the coefficient of thermal expansion of the glass in its liquid state and the second coefficient of thermal expansion is the coefficient of thermal expansion of the glass in its glassy state at room temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- m and a difference between a first coefficient of thermal expansion and a second coefficient of thermal expansion Δ
-
11. A glass article, the glass article comprising:
- at least about 65 mol % SiO2;
from about 7 mol % to about 16 mol % Al2O3;
from 0 mol % to about 10 mol % Li2O;
from about 6 mol % to about 16 mol % Na2O;
from 0 mol % to about 2.5 mol % K2O;
from 0 mol % to about 8.5 mol % MgO;
from 0 mol % to about 1.5 mol % CaO;
from 0 mol % to about 6 mol % ZnO; and
from 0 mol % to about 6 mol % ZrO2, wherein the glass article has a thickness of less than 400 μ
m and a difference between a first coefficient of thermal expansion and a second coefficient of thermal expansion Δ
CTE of less than 107×
107°
C.−
1, and wherein the first coefficient of thermal expansion is the coefficient of thermal expansion of the glass article in its liquid state and the second coefficient of thermal expansion is the coefficient of thermal expansion of the glass article in its glassy state. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- at least about 65 mol % SiO2;
Specification
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Current AssigneeCorning Incorporated
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Original AssigneeCorning Incorporated
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InventorsMauro, John Christopher, Smedskjaer, Morten Mattrup
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Application NumberUS13/961,211Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current428/220CPC Class CodesC03C 21/002 to perform ion-exchange bet...C03C 3/085 containing an oxide of a di...C03C 3/087 containing calcium oxide, e...
