Article with glass layer and glass-ceramic layer and method of making the article

• US 10,570,055 B2
• Filed: 02/12/2019
• Issued: 02/25/2020
• Est. Priority Date: 10/04/2012
• Status: Active Grant

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Boek, Heather Debra, Venkataraman, Natesan
• Primary Examiner(s): Colgan, Lauren R
• Application Number:
  US16/273,867
• Publication Number:
  US 20190185371A1
• Time in Patent Office: 378 Days
• Field of Search: 428426, 428428, 428432, 428688
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 2315/02 Ceramics
• CPC Class Codes: B32B 2315/08 Glass
• CPC Class Codes: B32B 2419/00 Buildings or parts thereof walls, panels B32B2607/00
• CPC Class Codes: B32B 2457/12 Photovoltaic modules
• CPC Class Codes: B32B 2457/208 Touch screens
• CPC Class Codes: B32B 2509/00 Household appliances
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: C03C 10/0018 containing SiO2, Al2O3 and monovalent metal oxide as main constituents
• CPC Class Codes: C03C 10/0027 containing SiO2, Al2O3, Li2O as main constituents
• CPC Class Codes: C03C 10/0045 containing SiO2, Al2O3 and MgO as main constituents
• CPC Class Codes: C03C 3/083 containing aluminium oxide or an iron compound
• CPC Class Codes: C03C 3/085 containing an oxide of a divalent metal

Abstract

A glass-ceramic composition is disclosed herein including: from about 60 mol. % to less than 72.0 mol. % SiO2; from about 10 mol. % to about 17 mol. % Al2O3; from about 3 mol. % to about 15 mol. % Na2O; from about 1 mol. % to about 8 mol. % Li2O; and from about 3 mol. % to about 7 mol. % TiO2. The glass-ceramic composition can be used to form one, two, or more, cladding layers of a laminated glass article, wherein the layer(s) of glass-ceramics material can be cerammed to form one or more glass layers.

Claims

1. A glass article comprising:

a glass core layer disposed between a first glass cladding layer and a second glass cladding layer;

wherein the glass core layer has a composition which is different from the composition of the first and second glass layers;

wherein the first glass cladding layer and the second glass cladding layer are formed from a glass-ceramic composition comprising;

from about 60 mol. % to less than 72.0 mol. % SiO₂;

from about 10 mol. % to about 17 mol. % Al₂O₃;

from about 3 mol. % to about 15 mol. % Na₂O;

from about 1 mol. % to about 8 mol. % Li₂O; and

from about 3 mol. % to about 7 mol. % TiO₂; and

wherein a net CTE difference between at least one of the first and second glass cladding layers, and the glass core layer, is from about 20×

10<sup>−

7</sup>/C to 62×

7×

10<sup>−

7/C.</sup>

2. The glass article of claim 1, wherein the first glass cladding layer and the second glass cladding layer comprise:

from about 64 mol. % to less than 72.0 mol. % SiO₂;

from about 11 mol. % to about 16 mol. % Al₂O₃;

from about 4 mol. % to about 13 mol. % Na₂O;

from about 2 mol. % to about 7 mol. % Li₂O; and

from about 4 mol. % to about 6 mol. % TiO₂.

3. The glass article of claim 1, wherein the first and second glass cladding layers have a coefficient of thermal expansion of from about 5×

10<sup>−

7</sup>/C to about 25×

10<sup>−

7</sup>/C.

4. The glass article of claim 1, wherein the first and second glass cladding layers have a coefficient of thermal expansion of from about 10×

10<sup>−

7</sup>/C to about 20×

10<sup>−

7</sup>/C.

5. The glass article of claim 1, wherein:

a first surface of the glass core layer is directly adjacent the first glass cladding layer; and

wherein a second surface of the glass core layer is directly adjacent the second glass cladding layer.

6. The glass article of claim 1, wherein the first glass cladding layer and the second glass cladding layer are compressively stressed.

7. The glass article of claim 1, wherein the first glass cladding layer and the second glass cladding layer further comprise an alkaline earth oxide.

8. A use of the glass article of claim 1 for cover glass or glass backplane applications in consumer or commercial electronic devices, for touch screen or touch sensor applications, for portable electronic devices, for photovoltaic applications, for architectural glass applications, for automotive or vehicular glass applications, or for commercial or household appliance applications.