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

Patent metadata

Field	Value
Publication number	US-2016264451-A1
Application number	US-201615160537-A
Country	US
Kind code	A1
Filing date	May 20, 2016
Priority date	Feb 28, 2013
Publication date	Sep 15, 2016
Grant date	—

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.

First claim

What is claimed is:

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 phase separated glass composition with a porous, interconnected matrix formed from a first phase of the phase separated glass composition.

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 free from alkali ions.

8 . 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. % SiO 2 ; from about 7 mol. % to about 10 mol. % Al 2 O 3 ; from about 14 mol. % to about 18 mol. % B 2 O 3 ; 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. %.

9 . The laminated glass article of claim 8 , wherein the glass composition is substantially free from alkali metals and compounds containing alkali metals.

10 . The laminated glass article of claim 1 , wherein the glass core layer comprises less than or equal to about 73 mol. % SiO 2 .

11 . 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.

12 . A laminated glass article comprising:
a glass core layer; and at least one glass cladding layer fused to the glass core layer, wherein:
the at least one glass cladding layer is phase separated into a first phase and at least one second phase having different compositions;
the first phase comprises an interconnected matrix; and
the at least one second phase is dispersed throughout the interconnected matrix.

13 . The laminated glass article of claim 12 , wherein the glass core layer comprises less than or equal to about 73 mol. % SiO 2 .

14 . The laminated glass article of claim 12 , 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.

15 . A method for forming a laminated glass article, the method comprising:
fusing at least one glass cladding layer to at least a portion of a glass core layer by contacting a molten glass core composition with a molten glass cladding composition, wherein the at least one glass cladding layer comprises a phase-separable glass composition; and heating the at least one glass cladding layer fused to the glass core layer to a temperature sufficient to effect a phase separation in the at least one glass cladding layer such that, after the heating, the at least one glass cladding layer comprises a first phase and at least one second phase, each of the first phase and the at least one second phase having different compositions.

16 . The method of claim 15 , wherein the first phase comprises an interconnected matrix and the at least one second phase is dispersed throughout the interconnected matrix.

17 . The method of claim 16 , wherein the at least one second phase is interconnected within the interconnected matrix of the first phase.

18 . The method of claim 15 further comprising selectively removing the at least one second phase from the at least one glass cladding layer such that the at least one glass cladding layer comprises a porous, interconnected matrix formed from the first phase of the phase-separable glass composition.

19 . The method of claim 18 further comprising coating or filling the porous, interconnected matrix of the at least one glass cladding layer with a secondary material.

20 . The method of claim 15 , wherein the at least one glass cladding layer comprises:
from about 60 mol. % to about 66 mol. % SiO 2 ; from about 7 mol. % to about 10 mol. % Al 2 O 3 ; from about 14 mol. % to about 18 mol. % B 2 O 3 ; 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 a concentration from about 3 mol. % to about 12 mol. %.

Assignees

• Corning Inc

Inventors

• He Mingqian
• Mauro John Christopher
• Parysek Ronald John
• Venkataraman Natesan

Classifications

• C03C4/005

  for opaline glass · CPC title

• B32B17/06

  comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} · CPC title

• Y10T428/249969

  Of silicon-containing material [e.g., glass, etc.] · CPC title

• B32B2250/03

  3 layers · CPC title

• C03C2214/30

  Methods of making the composites · CPC title