Glass composition

Patent metadata

Field	Value
Publication number	US-9988299-B2
Application number	US-201515109263-A
Country	US
Kind code	B2
Filing date	Jan 8, 2015
Priority date	Jan 16, 2014
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

The invention provides a glass composition with stronger bending strength and excellent transmission property in the visible range, containing the following cations with a total weight of over 90%: P 5+ , Al 3+ , B 3+ , R1 + , R 2+ and Cu 2+ , wherein the content of Cu 2+ is 0.1-15%; the ratio of Cu 2+ /(P 5+ +Al 3+ ) is 0.01-0.15; the content of the anion O 2− contained in the glass composition is up to over 97%; the bending strength of the glass composition is over 110 MPa; when the thickness of the glass composition is 0.3 mm, the spectral transmittance is more than or equal to 80% at a wavelength of 400 nm, the spectral transmittance is less than or equal to 25% at a wavelength of 700 nm, and the spectral transmittance is less than or equal to 25% at a wavelength of 1200 nm.

First claim

The invention claimed is:

1. A glass composition, containing the following cations with a total weight of over 98%: 55-75% of P 5+ , 12-25% of Al 3+ , 3-8% of B 3+ , more than 0 and less than 6% of R1 + , 0 to 5% of R 2+ and 0.5 to 5.2% of Cu 2+ , wherein the R1 + represents one or more of Li + , Na + and K + ; the R 2+ represents one or more of Mg 2+ , Ca 2+ , Sr 2+ and Ba 2+ ; the ratio of Cu 2+ /(P 5+ +Al 3+ ) is 0.01 to 0.07, and up to 2% optionally including at least one cation selected from the group consisting of Zn 2+ , A 4+ , D 5+ , E 3+ and Sb 3+ , wherein A 4+ represents one or more of Si 4+ , Ge 4+ and Zr 4+ ; D 5+ represents one or more of Nb 5+ , Ta 5+ and Gd 5+ ; E 3+ represents one or more of La 3+ and Y 3+ , and wherein Sb 3+ , if present, is present in an amount no greater than 1%; the content of the anion O 2− contained in the glass composition is over 97%.

2. The glass composition according to claim 1 , containing 0-5% of Na + ; 0-5% of K + ; and the remainder of Li + .

3. The glass composition according to claim 1 , containing 0.5 to less than 6% of Li + .

4. The glass composition according to claim 1 , containing at least one of A 4+ ; D 5+ ; E 3+ .

5. The glass composition according to claim 1 , containing Sb 3+ .

6. The glass composition according to claim 1 , containing more than 99% of anion O 2− .

7. The glass composition according to claim 1 , containing less than 3% of anion Hal − , wherein the Hal − represents one or more of F − , Cl − , Br − and I − .

8. The glass composition according to claim 1 , wherein the bending strength of the glass composition is over 130 MPa; when the thickness of the glass composition is 0.3 mm, the spectral transmittance is more than or equal to 82% at a wavelength of 400 nm, the spectral transmittance is less than or equal to 20% at a wavelength of 700 nm, and the spectral transmittance is less than or equal to 16% at a wavelength of 1200 nm; when the thickness of the glass composition is 0.3-0.35 mm, the wavelength range is 630-640 nm if the spectral transmittance is 50%.

9. The glass composition according to claim 1 , wherein the bending strength of the glass composition reaches more than 110 MPa.

10. The glass composition according to claim 1 , wherein when the thickness of the glass composition is 0.3 mm, the spectral transmittance is more than or equal to 80% at a wavelength of 400 nm, the spectral transmittance is less than or equal to 25% at a wavelength of 700 nm, and the spectral transmittance is less than or equal to 25% at a wavelength of 1200 nm; when the thickness of the glass composition is 0.3-0.35 mm, the wavelength range is 620-650 nm if the spectral transmittance is 50%.

11. The glass composition according to claim 1 , wherein the climate resistance of the glass composition reaches over Level 2.

12. A near-infrared light absorbing element, which is formed by the glass composition according to claim 1 .

13. A near-infrared light absorbing filter, which is formed by the glass composition according to claim 1 .

14. The glass composition according to claim 1 , containing Zn 2+ .

Assignees

• Cdgm Glass Co Ltd

Inventors

• Sun Wei

Classifications

• G02B27/0025

  for optical correction, e.g. distorsion, aberration · CPC title

• C03C3/19 Primary

  containing boron · CPC title

• G02B5/208

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• G02B5/226

  Glass filters · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title