Thermally strengthened architectural glass and related systems and methods

Patent metadata

Field	Value
Publication number	US-10611664-B2
Application number	US-201615748992-A
Country	US
Kind code	B2
Filing date	Jul 28, 2016
Priority date	Jul 31, 2014
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

A strengthened architectural glass or glass-ceramic sheet or article as well as processes and systems for making the strengthened architectural glass or glass-ceramic sheet or article is provided. The process comprises cooling the architectural glass sheet by non-contact thermal conduction for sufficiently long to fix a surface compression and central tension of the sheet. The process results in thermally strengthened architectural glass sheets that may be incorporated into one or more panes in single or multi-pane windows.

First claim

What is claimed is:

1. A window comprising:
a first glass-based layer comprising first and second major surfaces, a first body formed from a first glass material, and a first outer edge;
a second glass-based layer comprising first and second major surfaces, a second body formed from a second glass material, and a second outer edge;
the second glass-based layer spaced apart from and disposed substantially parallel to the first glass-based layer by a first distance;
the first and second major surfaces of the second glass-based layer separated by the thickness t, the first major surface of the second glass-based layer being flat to 100 μm total indicator run-out (TIR) along any 50 mm or less profile of the first major surface;
the second glass material having a low temperature linear CTE, expressed in 1/° C., of α S CTE, a high temperature linear CTE, expressed in 1/° C., of α L CTE, an elastic modulus, expressed in GPa, of E, a strain temperature, expressed in units of ° C., of T strain , and a softening temperature, expressed in units of ° C., of T soft ;
the first major surface of the second glass-based layer having a thermally induced surface compressive stress of less than 600 MPa and greater than

P
1

⁡

(
h
)

*
t

(

P
2

⁡

(
h
)

+
t

)

·
E
·

[

T
strain

·

α
CTE
s

+

α
CTE
L

·

(

T
soft

-

T
strain

)

]

;

in units of MPa;
wherein P 1 is given by

910.2
-

259.2
·

exp
(

-

h
0.143

)

;

P 2 is given by

2.53
+

23.65

(

1
+

(

h
0.00738

)

1.58

)

;

and h is greater than or equal to 0.020.

2. The window of claim 1 , wherein the first and second major surfaces of the second glass-based layer have respective areas and wherein the areas of the first and second major surfaces of the second glass-based layer are at least 50 cm 2 .

3. The window of claim 1 , wherein the second glass-based layer further comprises, a length, expressed in millimeters, of l, and a width, expressed in millimeters, of w, wherein t is less than l, and t is less than w.

4. The window according to claim 1 , wherein a surface roughness of the second glass-based layer second major surface is between 0.2 and 1.5 nm Ra roughness.

5. The window according to claim 1 , wherein the first and second major surfaces of the second glass-based layer are flat to at least 50 μm total indicator run-out along a 50 mm profile of the first and second major surfaces of the second glass-based layer.

6. The window according to claim 1 , wherein the first or second glass material is soda-lime glass, alkali aluminosilicate glass, alkali containing borosilicate glass, alkali aluminophosphosilicate glass, alkali aluminoborosilicate glass, photochromic glass, electrochromic glass, or thermochromic glass.

7. The window according to claim 1 , wherein the first glass-based layer comprises a thermally strengthened glass layer, a chemically strengthened glass layer, a mechanically strengthened glass layer, a thermally and chemically strengthened glass layer, a thermally and mechanically strengthened glass layer or a chemically and mechanically strengthened glass layer.

8. The window according to claim 1 , wherein the first glass material and the second glass material are the same.

9. The window according to claim 1 , wherein the first distance between the first and second glass-based layers comprises a noble gas or air.

10. The window according to claim 1 , further comprising a third glass-based layer having first and second major surfaces, a body formed from a third glass material, and a third outer edge;
wherein the third glass-based layer is spaced apart from and disposed substantially parallel to the first glass-based layer on a side opposite the second glass-based layer at a second spaced apart distance.

11. The window of claim 10 , wherein the third glass material is soda-lime glass, alkali aluminosilicate glass, alkali containing borosilicate glass, alkali aluminophosphosilicate glass, alkali aluminoborosilicate glass, photochromic glass, electrochromic glass, or thermochromic glass.

12. The window of claim 10 , wherein the first glass material, second glass material, and third glass material are the same.

13. The window according to claim 10 , wherein the third glass-based layer comprises a thermally strengthened glass layer, a chemically stre

Assignees

• Corning Inc

Inventors

• Lezzi Peter Joseph
• Maschmeyer Richard Orr
• Thomas John Christopher
• Wasson Kevin Lee

Classifications

• C03B35/24

  on a gas support bed · CPC title

• C03B29/12

  being in a horizontal position on a fluid support, e.g. a gas or molten metal · CPC title

• Y10T428/315

  Surface modified glass [e.g., tempered, strengthened, etc.] · CPC title

• C03B27/0413

  Stresses, e.g. patterns, values or formulae for flat or bent glass sheets · CPC title

• C03B27/048

  on a gas cushion · CPC title