X-ray induced coloration in glass or glass-ceramic articles

Patent metadata

Field	Value
Publication number	US-2016168023-A1
Application number	US-201514960941-A
Country	US
Kind code	A1
Filing date	Dec 7, 2015
Priority date	Dec 11, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

Embodiments of the present disclosure are directed to methods for inducing color change in glass and glass-ceramic articles. According to one embodiment, color change may be x-ray induced in glass or glass-ceramic articles. The method for x-ray inducing color change may include exposing the glass or glass-ceramic article to x-rays at a temperature of up to 200° C. to induce a colored area in the glass or glass-ceramic article. The glass or glass-ceramic article may comprise: 50-85 mole % SiO 2 ; 5-25 mole % Al 2 O 3 ; 0-15 mole % P 2 O 5 ; 0-15 mole % B 2 O 3 ; 5-25 mole % R 2 O, wherein R 2 O=Li 2 O+Na 2 O+K 2 O.

First claim

What is claimed is:

1 . A method of inducing a color change in a glass or glass-ceramic article, the method comprising:
exposing the glass or glass-ceramic article to x-rays at a temperature of up to 200° C. to induce a colored area in the glass or glass-ceramic article, wherein the glass or glass-ceramic article comprises: 50-85 mole % SiO 2 ; 5-25 mole % Al 2 O 3 ; 0-15 mole % P 2 O 5 ; 0-15 mole % B 2 O 3 ; 5-25 mole % R 2 O, wherein R 2 O=Li 2 O+Na 2 O+K 2 O.

2 . The method of claim 1 , wherein the color change is achieved without additional heating after x-ray exposure.

3 . The method of claim 1 , wherein the glass or glass-ceramic article is x-rayed at a temperature of up to 120° C.

4 . The method of claim 1 , wherein the glass or glass-ceramic article comprises 2-10 mole % B 2 O 3 .

5 . The method of claim 1 , wherein the glass or glass-ceramic article comprises 2-10 mole % P 2 O 5 .

6 . The method of claim 1 , wherein the glass or glass-ceramic article comprises 55-75 mole % SiO 2 .

7 . The method of claim 1 , wherein the glass or glass-ceramic article comprises 10-20 mole % Al 2 O 3 .

8 . The method of claim 1 , wherein the glass or glass-ceramic article comprises 0.2 to 1.0 mole % coloring agent.

9 . The method of claim 1 , wherein the glass or glass-ceramic article further comprises 0.1 to 5 mole % of at least one coloring agent.

10 . The method of claim 9 , wherein the coloring agent is chosen from CuO, MnO 2 , Ag 2 O, SnO 2 , or combinations thereof.

11 . The method of claim 1 , wherein the glass or glass-ceramic article comprises 10-20 mole % Na 2 O.

12 . The method of claim 1 , wherein the glass or glass-ceramic article comprises −20 mol %<R 2 O+RO—(Al 2 O 3 +P 2 O 5 +B 2 O 3 )<20 mol %, wherein RO=MgO+CaO+SrO+BaO+ZnO.

13 . The method of claim 1 , wherein the glass or glass-ceramic article comprises −10 mol %<R 2 O+RO—(Al 2 O 3 +P 2 O 5 +B 2 O 3 )<10 mol %, wherein RO=MgO+CaO+SrO+BaO+ZnO.

14 . The method of claim 1 , further comprising adding an x-ray mask over the glass or glass-ceramic article prior to x-ray exposure, wherein the x-ray mask produces a color change pattern in the glass or glass-ceramic article upon x-ray exposure.

15 . The method of claim 1 , further comprising reducing substantially the color change in the glass or glass-ceramic article by performing one or more melting steps.

16 . The method of claim 1 , wherein the glass or glass-ceramic article has a thickness ≦1.5 mm.

17 . The method of claim 1 , further providing the glass or glass-ceramic article, wherein providing the glass or glass-ceramic article comprises down-drawing the glass or glass-ceramic article.

18 . The method of claim 17 , wherein down-drawing the glass or glass-ceramic article comprises fusion drawing the glass or glass-ceramic article.

19 . The method of claim 17 , wherein providing the glass or glass-ceramic article comprises thermally or chemically strengthening the glass or glass-ceramic article.

20 . The method of claim 19 , wherein the glass or glass-ceramic article is chemically strengthened and has a compressive layer extending from at least one surface of the glass or glass-ceramic article to a depth of layer of at least 20 μm into the glass or glass-ceramic article, the compressive layer having a maximum compressive stress of at least 200 MPa.

21 . The method of claim 1 , wherein the glass or glass-ceramic article prior to x-ray exposure is colorless.

22 . A colored glass or glass-ceramic article having a thickness ≦1.5 mm and comprising an x-ray induced colored area in the glass or glass-ceramic article, the glass or glass-ceramic article comprising:
55-75 mole % SiO 2 ;
5-25 mole % Al 2 O 3 ;
0-10 mole % P 2 O 5 ;
0-10 mole % B 2 O 3 ;
5-25 mole % R 2 O, wherein R 2 O=Li 2 O+Na 2 O+K 2 O; and
0.1 to 2 mole % of at least one coloring agent chosen from CuO, MnO 2 , Ag 2 O, or combinations thereof.

23 . The article of claim 22 , wherein the colored glass or glass-ceramic article comprises 2-10 mole % B 2 O 3 .

24 . The article of claim 22 , wherein the colored glass or glass-ceramic article comprises 2-10 mole % P 2 O 5 .

25 . The article of claim 22 , wherein the colored glass or glass-ceramic article comprises 55-75 mole % SiO 2 .

26 . The article of claim 22 , wherein the colored glass or glass-ceramic article comprises 10-20 mole % Al 2 O 3 .

27 . The article of claim 22 , wherein the colored glass or glass-ceramic article comprises 0.2 to 1.0 mole % coloring agent.

28 . The article of claim 22 , wherein the coloring agent also includes SnO 2 .

29 . The article of claim 22 , wherein the colored glass or glass-ceramic article comprises −20 mol %<R 2 O+RO—(Al 2 O 3 +P 2 O 5 +B 2 O 3 )<20 mol %, wherein RO=MgO+CaO+SrO+BaO+ZnO.

30 . The article of claim 22 , wherein the colored glass or glass-ceramic article comprises −10 mol %<R 2 O+RO—(Al 2 O 3 +P 2 O 5 +B 2 O 3 )<10 mol %, wherein RO=MgO+CaO+SrO+BaO+ZnO.

31 . The article of claim 22 , wherein the colored area comprises a layer that extends from a surface of the glass or glass-ceramic article to a depth of 1-500 μm.

32 . The article of claim 22 , wherein the glass or glass-ceramic article is chemically or thermally strengthened.

33 . The article of claim 22 , wherein the colored glass or glass-ceramic article comprises 10-20 mole % Na 2 O.

Assignees

• Corning Inc

Inventors

• Baum Jr John F
• Borrelli Nicholas Francis
• Card Candy Elizabeth
• Dejneka Matthew John
• Fanning Eileen Marie
• Fitzsimmons Karen Estelle

Classifications

• C03C3/093

  containing zinc or zirconium · CPC title

• C03C25/624 Primary

  X-Rays · CPC title

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• C03C3/091

  containing aluminium · CPC title

• C03C4/02

  for coloured glass · CPC title