Non-contact coated glass and related coating system and method
Abstract
A coated glass article and of a system and method for forming a coated glass article are provided. The process includes applying a first coating precursor material to the first surface of the glass article and supporting the glass article via a gas bearing. The process includes heating the glass article and the coating precursor material to above a glass transition temperature of the glass article while the glass article is supported by the gas bearing such that during heating, a property of the first coating precursor material changes forming a coating layer on the first surface of the glass article from the first precursor material. The high temperature and/or non-contact coating formation may form a coating layer with one or more new physical properties, such as a deep diffusion layer within the glass, and may form highly consistent coatings on multiple sides of the glass.
Claims
exact text as granted — not AI-modifiedWhat is claimed:
1 . A method of strengthening a glass sheet, comprising:
thermally-tempering glass of the glass sheet to impart a compressive stress therein greater than
{
P
2
(
h
)
*
t
(
P
0
(
h
)
+
t
)
·
E
·
[
T
strain
·
a
CTE
S
+
a
CTE
L
·
(
T
soft
-
T
strain
)
]
}
,
where:
P
1
is
[
910.2
-
259.2
·
exp
(
-
h
0.143
)
]
,
P
2
is
[
2.53
+
23.65
(
1
+
(
h
0.00738
)
1.58
)
]
,
t is a thickness of the glass sheet, and wherein the t is less than 3 mm,
h is a heat transfer coefficient greater than or equal to 0.020 cal/s·cm 2 ·° C.,
a S CTE is a low temperature linear CTE of the glass in 1/° C.,
a L CTE is a high temperature linear CTE of the glass in 1/° C.,
E is an elastic modulus of the glass in GPa,
T soft is temperature in ° C. of glass of the glass sheet at viscosity of 10 7.6 Poise, and
T strain is temperature in ° C. of the glass of the glass sheet at a viscosity of 10 14.7 Poise; and
wherein, after the thermal-tempering, the glass sheet comprises a non-dimensional surface fictive temperature θ s of the glass sheet between 0.2 and 0.9, where:
θ s is (T fs −T anneal )/(T soft −T anneal ),
T fs is fictive temperature in ° C. of the glass of the glass sheet at a surface therof,
T anneal is temperature in ° C. of the glass of the glass sheet at viscosity of 10 13.2 Poise.
2 . The method of claim 1 , where h is 0.0625 cal/s·cm 2 ·° C.
3 . The method of claim 2 , wherein the glass comprises soda lime silicate.
4 . The method of claim 1 , further comprising ion-exchanging the glass sheet after the thermally-tempering to further strengthen the glass sheet.
5 . The method of claim 4 , wherein compressive stresses of the glass sheet are further increased by at least 100 MPa from the ion-exchanging.
6 . The method of claim 1 , wherein, after the thermally-tempering, the glass sheet comprises a surface comprising a 50 mm profile that is flat to 100 μm total indicator run-out.
7 . The method of claim 1 , wherein, after the thermally-tempering, the glass sheet comprises a surface comprising an area of 10 μm by 10 μm having a roughness in a range of from 0.2 to 1.5 nm Ra thereover.Join the waitlist — get patent alerts
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