Colored glass articles having improved mechanical durability

1. A colored glass article 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 20 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 1 mol % and less than or equal to 20 mol % Li 2 O;

greater than 0 mol % and less than or equal to 15 mol % Na 2 O;

greater than or equal to 1 mol % and less than or equal to 35 mol % R 2 O, wherein R 2 O is the sum of Li 2 O, Na 2 O, and K 2 O;

greater than 1×10 −6 mol % and less than or equal to 5 mol % of a colorant, wherein the colorant comprises at least one of Cr 2 O 3 , Au, Ag, CuO, NiO, Co 3 O 4 , TiO 2 , CeO 2 ; and

greater than or equal to 12 mol % and less than or equal to 24 mol % of Al 2 O 3 +MgO+CaO+ZnO, wherein the colored glass article comprises:

a transmittance color coordinate in CIELAB color space comprising an L* value greater than or equal to 55 and less than or equal to 96.5 and an a* value and a b* value, wherein |a*| is ≥0.3 and |b*| is ≥0.5, as measured under F2 illumination and a 10° standard observer angle;

a compressive stress profile with a surface compressive stress greater than or equal to 200 MPa and a central tension greater than or equal to 60 MPa;

a dielectric constant from 5.6 to 6.4 over a frequency range from 10 GHz to 60 GHz; and

the thickness t is greater than or equal to 0.4 mm and less than or equal to 5 mm.

2. The colored glass article of claim 1 , wherein the thickness t is greater than or equal to 0.5 mm and less than or equal to 5 mm.

3. The colored glass article of claim 1 , wherein a colored glass article having the same composition and microstructure as a center of the colored glass article has a fracture toughness K IC greater than or equal to 0.7 MPa·m 1/2 .

4. The colored glass article of claim 1 , comprising an average transmittance of greater than or equal to 10% and less than or equal to 92% over a wavelength range of 380 nm to 750 nm.

5. The colored glass article of claim 1 , further comprising at least one crystalline phase.

6. The colored glass article of claim 1 , comprising a crystallinity of less than 10 wt %.

7. The colored glass article of claim 1 , wherein the depth of compression is less than or equal to 0.3t.

8. The colored glass article of claim 1 , wherein the surface compressive stress is greater than or equal to 400 MPa.

9. The colored glass article of claim 1 , wherein the central tension is greater than or equal to 70 MPa.

10. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* and b* values within a region of a plot of a* vs. b* bound by the intersection of lines:

b*= 0.2879· a*+ 27.818;

b*= 7.0833· a*− 94.5;

b*= 0.45· a*+ 104.5; and

b*= 15.3· a*+ 253.

11. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* and b* values within a region of a plot of a* vs. b* bound by the intersection of lines:

b*= 7.0833· a*− 94.5;

b*=− 0.9583· a*+ 146.75;

b*= 2.6957· a*− 50.565; and

b*= 33.

12. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* and b* values within a region of a plot of a* vs. b* bound by the intersection of lines:

b*= 2.6957· a*− 50.565;

a*= 54;

b*= 1.0769· a*− 17.154; and

b*= 6.6667· a*− 173.67.

13. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* and b* values within a region of a plot of a* vs. b* bound by the intersection of lines:

b*= 0.2879· a*+ 27.818;

a*= 0;

b*=− 1.375· a*+ 1; and

b*= 9.333· a*+ 86.667,

exclusive of a* values greater than −0.3 and less than 0.3 and exclusive of b* values greater than −0.5 and less than 0.5.

14. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* and b* values within a region of a plot of a* vs. b* bound by the intersection of lines:

b*= 0.0833· a*+ 20.833;

b*= 2.1182· a*− 32.073;

b*=− 0.3; and

b*= 1.5929· a*− 0.3,

exclusive of a* values greater than −0.3 and less than 0.3 and exclusive of b* values greater than −0.5 and less than 0.5.

15. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −18 and less than or equal to 0.3, exclusive of a* values greater than −0.3 and less than 0.3, and b* values greater than or equal to 0.5 and less than or equal to 82.

16. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −18 and less than or equal to 18, exclusive of a* values greater than −0.3 and less than 0.3, and b* values greater than or equal to 0.5 and less than or equal to 82.

17. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −20 and less than or equal to 60, exclusive of a* values greater than −0.3 and less than 0.3, and b* values greater than or equal to −90 and less than or equal to 85, exclusive of b* values greater than −0.5 and less than 0.5.

18. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −35 and less than or equal to −0.3, and b* values greater than or equal to 0.5 and less than or equal to 82.

19. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −35 and less than or equal to 20, exclusive of a* values greater than −0.3 and less than 0.3, and b* values greater than or equal to 0.5 and less than or equal to 75.

20. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −15 and less than or equal to 65, exclusive of a* values greater than −0.3 and less than 0.3, and b* values greater than or equal to −90 and less than or equal to 80, exclusive of b* values greater than −0.5 and less than 0.5.

21. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −35 and less than or equal to 60, exclusive of a* values greater than −0.3 and less than 0.3, and b* values greater than or equal to −90 and less than or equal to 80, exclusive of b* values greater than −0.5 and less than 0.5.

22. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −15 and less than or equal to −0.3 and b* values greater than or equal to −10 and less than or equal to 10, exclusive of b* values greater than −0.5 and less than 0.5.

23. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −5 and less than or equal to 25, exclusive of a* values greater than −0.3 and less than 0.3, and b* greater than or equal to −20 and less than or equal to 5, exclusive of b* values greater than −0.5 and less than 0.5.

24. The colored glass article of claim 1 , wherein the transmittance color coordinate in the CIELAB color space comprises a* values greater than or equal to −10 and less than or equal to 25, exclusive of a* values greater than −0.3 and less than 0.3, and b* values greater than or equal to −20 and less than or equal to 5, exclusive of b* values greater than −0.5 and less than 0.5.

25. An electronic device comprising a housing, the housing comprising a colored glass article as recited in claim 1 .

26. The colored glass article of claim 1 , wherein the colored glass article comprises greater than or equal to 1 mol % and less than or equal to 12 mol % B 2 O 3 .

27. The colored glass article of claim 1 , the colored glass article comprises greater than or equal to 1 mol % and less than or equal to 18 mol % Li 2 O.

28. The colored glass article of claim 1 , the colored glass article comprises greater than or equal to 0.01 mol % and less than or equal to 12 mol % Na 2 O.