Colored glasses with improved tempering capabilities

Patent metadata

Field	Value
Publication number	US-11492286-B2
Application number	US-201816767170-A
Country	US
Kind code	B2
Filing date	Nov 30, 2018
Priority date	Nov 30, 2017
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

The disclosure relates to highly temperable colored glass compositions. The colored glass compositions have high coefficients of thermal expansion and high Young's moduli that advantageously absorb in the ultraviolet and/or blue wavelength ranges. Methods of making such glasses are also provided.

First claim

The invention claimed is:

1. A glass composition comprising:
55-75 mol % SiO 2 ;
5-10 mol % Al 2 O 3 ;
3-10 mol % MgO;
5-15 mol % CaO;
8-15 mol % Na 2 O+K 2 O;
0-15 mol % Na 2 O;
0-15 mol % K 2 O;
>1-4 mol % TiO 2 ;
1.5-6 mol % B 2 O 3 ; and
>0-2 mol % CeO 2 , Ho 2 O 3 , CuO, NiO, or combinations thereof.

2. The glass composition of claim 1 , wherein the glass composition has a low temperature coefficient of thermal expansion (LTCTE) measured from 25° C. to 300° C. and a high temperature coefficient of thermal expansion (HTCTE) measured at temperature above glass transition region, and wherein the sum of the LTCTE and the HTCTE is 350×10 −7 /° C. or greater.

3. The glass composition of claim 1 , wherein the glass composition has a temperability, ψ, and the temperability, ψ, is equal to or greater than 0.80.

4. The glass composition of claim 1 , wherein the glass composition exhibits a color presented in SCE color space coordinates with the following values:
a*=from about −10 to about 30;
b*=from about 0 to about 30; and
L*>83.

5. The glass composition of claim 2 , wherein sum of the LTCTE and the HTCTE is 400×10 −7 /° C. or greater.

6. The glass composition of claim 3 , wherein the temperability, is equal to or greater than 0.90.

Assignees

• Corning Inc

Inventors

• Kiczenski Timothy James
• Lezzi Peter Joseph
• Pierson-Stull Michelle Diane
• Wu Jingshi

Classifications

• C03C3/095

  containing rare earths · CPC title

• C03C2201/3423

  Cerium · CPC title

• C03C4/02 Primary

  for coloured glass · CPC title

• C03C2201/36

  containing rare earth metals and aluminium, e.g. Er-Al co-doped · CPC title

• C03C3/091 Primary

  containing aluminium · CPC title