Glass-ceramics and glasses

Patent metadata

Field	Value
Publication number	US-10450220-B2
Application number	US-201816171939-A
Country	US
Kind code	B2
Filing date	Oct 26, 2018
Priority date	Dec 13, 2017
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

A glass-ceramic includes glass and crystalline phases, where the crystalline phase includes non-stoichiometric suboxides of titanium, forming ‘bronze’-type solid state defect structures in which vacancies are occupied with dopant cations.

First claim

What is claimed is:

1. A glass-ceramic, comprising:
an amorphous phase; and
a crystalline phase comprising precipitates of formula M x TiO 2 , where 0<x<1 and M is a dopant cation,
wherein precipitates of the crystalline phase are homogenously distributed within the glass-ceramic such that the precipitates of formula M x TiO 2 are present from an exterior surface of the glass-ceramic and throughout a bulk of the glass-ceramic, and
wherein the crystalline and amorphous phases are such that the glass-ceramic exhibits 20% or less haze, where haze is percentage of transmitted light scattered outside an angular cone of ±2.5° over a transmission path of 1 mm of the glass-ceramic.

2. The glass-ceramic of claim 1 , wherein at least some of the precipitates are at least 1 nm long and no more than 300 nm long.

3. The glass-ceramic of claim 2 , wherein the precipitates of formula M x TiO 2 are a volume fraction in the glass-ceramic of at least 0.001% and no more than 20%.

4. The glass-ceramic of claim 3 , wherein the precipitates of formula M x TiO 2 are a volume fraction in the glass-ceramic of at least 5%.

5. The glass-ceramic of claim 3 , wherein the dopant cation comprises H, Li, Na, K, Rb, Cs, Ca, Sr, Ba, Zn, Ag, Au, Cu, Sn, Cd, In, Tl, Pb, Bi, Th, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, U, V, Cr, Mn, Fe, Ni, Cu, Pd, Se, Ta, Bi, and/or Ce.

6. A glass-ceramic, comprising:
silicate glass; and
crystals homogenously distributed within the silicate glass,
wherein the crystals comprise titanium suboxides intercalated with dopant cations that are present from an exterior surface of the glass-ceramic and throughout a bulk of the glass-ceramic, and
wherein the crystals and silicate glass are structured such that the glass-ceramic is optically transparent and ultraviolet absorbent, having:
transmittance of 1%/mm or greater over at least one 50 nm-wide wavelength band of light in a range from 400 nm to 700 nm wavelength, and
absorption of at least 90%/mm for light in at least one 50 nm-wide wavelength band of light having a wavelength less than 400 nm wavelength.

7. The glass-ceramic of claim 6 , wherein the crystals are at least 1 nm long and no more than 300 nm long.

8. The glass-ceramic of claim 7 , wherein the crystals are a volume fraction in the glass-ceramic of at least 0.001% and no more than 20%.

9. The glass-ceramic of claim 8 , wherein the crystals are a volume fraction in the glass-ceramic of at least 5%.

10. The glass-ceramic of claim 8 , wherein the dopant cations comprise H, Li, Na, K, Rb, Cs, Ca, Sr, Ba, Zn, Ag, Au, Cu, Sn, Cd, In, Tl, Pb, Bi, Th, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, U, V, Cr, Mn, Fe, Ni, Cu, Pd, Se, Ta, Bi, and/or Ce.

11. A glass-ceramic, comprising:
a glass phase; and
a crystalline phase comprising suboxides of titanium that form solid state defect structures in which holes are occupied with dopant cations, wherein the crystalline phase is homogenously distributed within the glass-ceramic such that the suboxides of titanium are present from an exterior surface of the glass-ceramic and throughout a bulk of the glass-ceramic,
wherein the glass and crystalline phases are such that the glass-ceramic is optically transparent and has strong attenuation of near infrared light, having:
transmittance of 1%/mm or greater over at least one 50 nm-wide wavelength band of light in a range from 400 nm to 700 nm wavelength, and
absorption of at least 90%/mm for light in at least one 50 nm-wide wavelength band of light in a range from 700 nm to 1700 nm wavelength.

12. The glass-ceramic of claim 11 , wherein the crystalline phase is a volume fraction in the glass-ceramic of at least 0.001% and no more than 20%.

13. The glass-ceramic of claim 12 , wherein the crystalline phase is a volume fraction in the glass-ceramic of at least 5%.

14. The glass-ceramic of claim 13 , wherein the dopant cations comprise H, Li, Na, K, Rb, Cs, Ca, Sr, Ba, Zn, Ag, Au, Cu, Sn, Cd, In, Tl, Pb, Bi, Th, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, U, V, Cr, Mn, Fe, Ni, Cu, Pd, Se, Ta, Bi, and/or Ce.

15. The glass-ceramic of claim 1 , wherein the precipitates are located at nucleation sites internal to the glass-ceramic.

16. The glass-ceramic of claim 6 , wherein the crystals are located at nucleation sites internal to the glass ceramic.

17. The glass-ceramic of claim 11 , wherein crystals of the crystalline phase are located at nucleation sites internal to the glass ceramic.

18. The glass-ceramic of claim 1 , having an optical density per mm of 6.0 or less, as measured with a spectrometer where optical density is −log (I/I 0 ), where I 0 is intensity of light incident on the glass-ceramic and I is intensity of light transmitted through the glass-ceramic, averaged over near-infrared absorbance.

19. The glass-ceramic of claim 1 , wherein the amorphous and crystalline phases are such that the glass-ceramic is optically transparent and ultraviolet absorbent, having:
transmittance of 1%/mm or greater over at least one 50 nm-wide wavelength band of light in a range from 400 nm to 700 nm wavelength, and
absorption of at least 90%/mm for light in at least one 50 nm-wide wavelength band of light having a wavelength less than 400 nm wavelength.

20. The glass-ceramic of claim 1 , wherein the amorphous and crystalline phases are such that the glass-ceramic is optically transparent and has strong attenuation of near infrared light, having:
transmittance of 1%/mm or greater over at least one 50 nm-wide wavelength band of light in a range from 400 nm to 700 nm wavelength, and
absorption of at least 90%/mm for light in at least one 50 nm-wide wavelength band of light in a range from 700 nm to 1700 nm wavelength.

21. The glass-ceramic of claim 6 , having an optical density per mm of 6.0 or less, as measured with a spectrometer where optical density is −log (I/I 0 ), where I 0 is intensity of light incident on the glass-ceramic and I is intensity of light transmitted through the glass-ceramic, averaged over near-infrared absorbance.

22. The glass-ceramic of claim 6 , wherein the silicate glass and crystals are such that the glass-ceramic exhibits 20% or less haze, where haze is percentage of transmitted light scattered outside an angular cone of ±2.5° over a transmission path of 1 mm of the glass-ceramic.

23. The glass-ceramic of claim 6 , wherein the silicate glass and crystals are such that the glass-ceramic is optically transparent and has strong attenuation of near infrared light, having:
transmittance of 1%/mm or greater over at least one 50 nm-wide wavelength band of light in a range from 400 nm to 700 nm wavelength, and
absorption of at least 90%/mm for light in at least one 50 nm-wide wavelength band of light in a range from 700 nm to 1700 nm wavelength.

24. The glass-ceramic of claim 11 , having an optical density per mm of 6.0 or less, as measured with a spectrometer where optical density is −log (I/I 0 ), where I 0 is intensity of light incident on the glass-ceramic and I is intensity of light transmitted through the glass-ceramic, averaged over near-infrared absorbance.

25. The glass-ceramic of claim 11 , wherein the crystalline and glass phases are such that the glass-ceramic exhibits 20% or less haze, where haze is percentage of transmitted light scattered outside an angular cone of ±2.5° over a transmission path of 1 mm of the glass-ceramic.

26. The glass-ceramic of claim

Assignees

• Corning Inc

Inventors

• Dejneka Matthew John
• Kohl Jesse

Classifications

• G02B1/02

  made of crystals, e.g. rock-salt, semi-conductors (G02B1/08 takes precedence) · CPC title

• C03C21/001

  in liquid phase, e.g. molten salts, solutions · CPC title

• C03C4/02

  for coloured glass · CPC title

• C03C3/118

  containing aluminium · CPC title

• C03C4/085

  for ultraviolet absorbing glass · CPC title