Glass sheet

Patent metadata

Field	Value
Publication number	US-9670089-B2
Application number	US-201013382650-A
Country	US
Kind code	B2
Filing date	Jul 7, 2010
Priority date	Jul 8, 2009
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A glass sheet has a thickness of 2 mm or less and has a refractive index nd of 1.60 or more. The glass sheet allows light emitted from an organic light-emitting layer to be efficiently extracted to the outside and has high gas-barrier properties. The glass sheet comprises 15-40 mass % of BaO.

First claim

The invention claimed is:

1. A glass substrate, which has a thickness of 2 mm or less and has a refractive index nd of 1.55 or more, wherein the glass substrate comprises, in terms of mass %, 10 to 50% of SiO 2 , 15 to 40% of BaO, 0 to 3% of Ta 2 O 5 , 35% or less of Nb 2 O 5 , 5% or less of ZrO 2 , 0 to 8.5% of ZnO, less than 0.1% of Li 2 O+Na 2 O+K 2 O, 0 to 6% of B 2 O 3 , 3 to less than 10% of TiO 2 , and is free of PbO, and has a thermal expansion coefficient of 60×10 −7 /° C. to 120×10 −7 /° C. in a temperature range of 30 to 380° C.

2. The glass substrate according to claim 1 , wherein the glass substrate has a refractive index nd of 1.60 or more and has a transmittance of 75% or more at a thickness of 0.7 mm and at a wavelength of light of 400 nm.

3. The glass substrate according to claim 1 , wherein the glass substrate has a thickness of 150 μm or less.

4. The glass substrate according to claim 1 , wherein the glass substrate comprises 0 to 0.1 mass % of Fe 2 O 3 .

5. The glass substrate according to claim 1 , wherein at least one surface of the glass substrate comprises an unpolished surface, and the unpolished surface has a surface roughness Ra of less than 1 nm.

6. The glass substrate according to claim 5 , wherein the other surface of the glass substrate has a surface roughness Ra of 1 nm or more.

7. The glass substrate according to claim 6 , wherein the other surface is subjected to surface roughening treatment.

8. The glass substrate according to claim 1 , wherein the glass substrate has a liquidus viscosity of 10 3.5 dPa·s or more.

9. The glass substrate according to claim 1 , wherein the glass substrate is used as a substrate for a lighting device or an OLED device.

10. The glass substrate according to claim 1 , wherein the glass substrate is used for sealing a lighting device or an OLED device.

11. A lighting device, comprising the glass substrate according to claim 1 .

12. An OLED device, comprising the glass substrate according to claim 1 .

13. The glass substrate according to claim 1 , wherein the glass substrate has a refractive index nd of 1.62 or more.

14. The glass substrate according to claim 1 , wherein the glass substrate comprises 20 to 40 mass % of BaO.

15. The glass substrate according to claim 1 , wherein the glass substrate comprises 1 to 15 mass % of SrO.

Assignees

• Yanase Tomoki
• Murata Takashi
• Nippon Electric Glass Co

Inventors

• Yanase Tomoki
• Murata Takashi

Classifications

• C03C3/095

  containing rare earths · CPC title

• C03C4/0092 Primary

  for glass with improved high visible transmittance, e.g. extra-clear glass · CPC title

• Y10T428/24355

  Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] · CPC title

• C03C3/097

  containing phosphorus, niobium or tantalum · CPC title

• H05B33/04

  Sealing arrangements {, e.g. against humidity} · CPC title