Laminated glass articles with phase-separated claddings and methods for forming the same

• US 10,259,739 B2
• Filed: 05/20/2016
• Issued: 04/16/2019
• Est. Priority Date: 02/28/2013
• Status: Active Grant

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: He, Mingqian, Mauro, John Christopher, Parysek, Ronald John, Venkataraman, Natesan
• Primary Examiner(s): Sample, David
• Application Number:
  US15/160,537
• Publication Number:
  US 20160264451A1
• Time in Patent Office: 1,061 Days
• Field of Search: None
• 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 2250/03 3 layers
• CPC Class Codes: B32B 2307/418 Refractive
• CPC Class Codes: B32B 2307/42 Polarizing, birefringent, filtering
• CPC Class Codes: B32B 2307/716 Degradable
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 7/027 Thermal properties
• CPC Class Codes: C03B 17/02 Forming molten glass coated with coloured layers; Forming molten glass of different compositions or layers; Forming molten glass comprising reinforcements or inserts
• CPC Class Codes: C03B 17/064 by the overflow downdraw fusion process; Isopipes therefor
• CPC Class Codes: C03C 1/004 Refining agents refining C03B5/225
• CPC Class Codes: C03C 11/005 obtained by leaching after a phase separation step
• CPC Class Codes: C03C 14/00 Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix devitrified glass ceramics C03C10/00
• CPC Class Codes: C03C 15/00 Surface treatment of glass, not in the form of fibres or filaments, by etching etching or surface-brightening compositions, in general C09K13/00
• CPC Class Codes: C03C 2214/30 Methods of making the composites
• CPC Class Codes: C03C 23/0095 Solution impregnating; Solution doping; Molecular stuffing, e.g. of porous glass in manufacture of preforms C03B37/012
• CPC Class Codes: C03C 3/091 containing aluminium
• CPC Class Codes: C03C 4/005 for opaline glass
• CPC Class Codes: Y10T 428/249969 Of silicon-containing material [e.g., glass, etc.]
• CPC Class Codes: Y10T 428/249994 Composite having a component wherein a constituent is liquid or is contained within preformed walls [e.g., impregnant-filled, previously void containing component, etc.]

Abstract

Laminated glass articles and methods for making the same are disclosed. In one embodiment, a laminated glass article may include a glass core layer and at least one glass cladding layer fused to the glass core layer. The at least one glass cladding layer may be phase separated into a first phase and at least one second phase having different compositions. The first phase of the at least one glass cladding layer may have an interconnected matrix. The at least one second phase of the at least one glass cladding layer may be dispersed throughout the interconnected matrix of the first phase of the at least one glass cladding layer. In some embodiments, the at least one second phase may be selectively removed from the interconnected matrix leaving a porous, interconnected matrix of the first phase.

Claims

1. A laminated glass article comprising:

a glass core layer; and

at least one glass cladding layer fused to the glass core layer and comprising a porous, interconnected matrix, wherein the at least one glass cladding layer is free from alkali ions.

2. The laminated glass article of claim 1, wherein the porous, interconnected matrix of the at least one glass cladding layer is coated or filled with a secondary material.

3. The laminated glass article of claim 2, wherein the secondary material comprises a catalytically active material.

4. The laminated glass article of claim 2, wherein the secondary material comprises a biologically active material.

5. The laminated glass article of claim 2, wherein the secondary material comprises a polymer material.

6. The laminated glass article of claim 5, wherein the polymer material enhances a toughness of the laminated glass article.

7. The laminated glass article of claim 1, wherein the at least one glass cladding layer is formed from a glass composition comprising:

from about 60 mol. % to about 66 mol. % SiO₂;

from about 7 mol. % to about 10 mol. % Al₂O₃;

from about 14 mol. % to about 18 mol. % B₂O₃;

from about 9 mol. % to about 16 mol. % alkaline earth oxide, wherein the alkaline earth oxide comprises at least CaO and the CaO is present in the glass composition in a concentration from about 3 mol. % to about 12 mol. %.

8. The laminated glass article of claim 1, wherein the glass core layer comprises greater than or equal to 60 mol. % and less than or equal to about 73 mol. % SiO₂.

9. The laminated glass article of claim 1, wherein the at least one glass cladding layer is fused to the glass core layer by contacting a molten glass core composition with a molten glass cladding composition.