Colored glass articles having improved mechanical durability
A colored glass article includes greater than or equal to 50 mol % and less than or equal to 80 mol % SiO 2 ; greater than or equal to 7 mol % and less than or equal to 25 mol % Al 2 O 3 ; greater than or equal to 1 mol % and less than or equal to 15 mol % B 2 O 3 ; greater than or equal to 5 mol % and less than or equal to 20 mol % Li 2 O; greater than or equal to 0.5 mol % and less than or equal to 15 mol % Na 2 O; greater than 0 mol % and less than or equal to 1 mol % K 2 O; and greater than or equal to 1×10 −6 mol % and less than or equal to 1 mol % Au. R 2 O—Al 2 O 3 is greater than or equal to −5 mol % and less than or equal to 7 mol %, R 2 O being the sum of Li 2 O, Na 2 O, and K 2 O.
1. A glass composition comprising:
greater than or equal to 50 mol % and less than or equal to 80 mol % SiO 2 ;
greater than or equal to 7 mol % and less than or equal to 25 mol % Al 2 O 3 ;
greater than or equal to 1 mol % and less than or equal to 15 mol % B 2 O 3 ;
greater than or equal to 7 mol % and less than or equal to 20 mol % Li 2 O;
greater than or equal to 0.5 mol % and less than or equal to 12 mol % Na 2 O;
greater than 0 mol % and less than or equal to 1 mol % K 2 O; and
greater than or equal to 1×10 −6 mol % and less than or equal to 0.0016 mol % Au, wherein:
R 2 O—Al 2 O 3 is greater than or equal to −5 mol % and less than or equal to 5 mol %, R 2 O being the sum of Li 2 O, Na 2 O, and K 2 O.
2. The glass composition of claim 1 , wherein R 2 O—Al 2 O 3 is greater than or equal to −3 mol % and less than or equal to 5 mol %.
3. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 0.0001 mol % and less than or equal to 0.001 mol % Au.
4. The glass composition of claim 1 , wherein R 2 O is greater than or equal to 6 mol % and less than or equal to 25 mol %.
5. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 0.01 mol % and less than or equal to 2 mol % ZrO 2 .
6. The glass composition of claim 1 , wherein 5.72*Al 2 O 3 (mol %)−21.4*ZnO (mol %)−2.5*P 2 O 5 (mol %)−35*Li 2 O (mol %)−16.6*B 2 O 3 (mol %)−20.5*MgO (mol %)−23.3*Na 2 O (mol %)−27.9*SrO (mol %)−18.5*K 2 O (mol %)−26.3*CaO (mol %) is greater than −609 mol %.
7. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 0.01 mol % and less than or equal to 1 mol % SnO 2 .
8. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 7 mol % and less than or equal to 18 mol % Li 2 O.
9. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 1 mol % and less than or equal to 12 mol % Na 2 O.
10. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 0.1 mol % and less than or equal to 0.5 mol % K 2 O.
11. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 2 mol % and less than or equal to 12 mol % B 2 O 3 .
12. A colored glass article comprising the glass composition of claim 1 .
13. The colored glass article of claim 12 , wherein the colored glass article has a transmittance color coordinate in the CIELAB color space, as measured at an article thickness of 1.33 mm under F2 illumination and a 100 standard observer angle, of:
L* greater than or equal to 50 and less than or equal to 100;
a* greater than or equal to −15 and less than or equal to 25; and
b* greater than or equal to −25 and less than or equal to 25.
14. The colored glass article of claim 12 , wherein the colored glass article has a thickness greater than or equal to 250 μm and less than or equal to 6 mm.
15. The colored glass article of claim 12 , wherein the colored glass article is an ion-exchanged colored glass article.
16. The colored glass article of claim 15 , wherein the ion-exchanged colored glass article has a depth of compression 10 μm or greater.
17. The colored glass article of claim 15 , wherein the ion-exchanged colored glass article has a surface compressive stress greater than or equal to 300 MPa.
18. The colored glass article of claim 15 , wherein the ion-exchanged colored glass article has a maximum central tension greater than or equal to 40 MPa.
19. A consumer electronic device, comprising:
a housing having a front surface, a back surface, and side surfaces; and
electrical components provided at least partially within the housing, the electrical components including at least a controller, a memory, and a display, the display being provided at or adjacent the front surface of the housing;
wherein the housing comprises the colored glass article of claim 15 .
20. A method of heat treating the glass composition of claim 1 , the method comprising:
heat treating the glass composition to form a glass article,
subjecting the glass article to a heat treatment cycle at a temperature greater than or equal to 500° C. and less than or equal to 800° C. and a duration greater than or equal to 0.25 hour and less than or equal to 24 hours to produced the colored glass article.