Blue glass composition

1. A blue colored, infrared and ultraviolet radiation absorbing glass substrate comprising a glass composition comprising a base glass portion and a glass colorant portion, wherein the base glass portion is a soda-lime-silica base portion, and the glass colorant portion is selected to provide a glass having chromaticity coordinates of a* in the range of −2 to −11 and b* in the range of −1 to −15, and a luminous transmittance of 35 to less than 70%, at a reference thickness of 0.160 inch (4.06 mm), wherein the colorant portion comprises:

total iron, expressed as Fe 2 O 3 , in the range of 0.60 to 2.0 weight percent (wt %);

CoO in the range of 30 to 250 parts per million (ppm);

Er 2 O 3 in the range of 0.01 to 3 wt %;

TiO 2 in the range of 0 to 0.9 wt %,

Nd 2 O 3 in the range of 0 to 3 wt %, and

Cr 2 O 3 in the range of 5 to 200 ppm,

wherein the wt % and the ppm are based on the final glass composition.

2. The glass substrate according to claim 1 , wherein the soda-lime-silica base portion is selected from the following Groups:

Group 1: the base portion comprises:

Weight Percent

SiO 2

66 to 75;

Na 2 O

10 to 20;

CaO

 5 to 15;

MgO

 0 to 5;

Al 2 O 3

 0 to 5,

K 2 O

 0 to 5, and

Group 2: the base portion comprises:

Weight Percent

SiO 2

66 to 75;

Na 2 O

10 to 20;

CaO

 5 to 15;

MgO

 0 to 5;

Al 2 O 3

 0 to 5;

K 2 O

 0 to 5, and

B 2 O 3

greater than 0 to 5

wherein the wt % are based on the final glass composition.

3. The glass substrate according to claim 1 , wherein the glass composition has a color characterized by a dominant wavelength in the range of 479 to 495 nanometers and an excitation purity of at least 8% at a thickness of 0.160 inches.

4. The glass substrate according to claim 1 wherein the wt % the total iron is in the range of from greater than 0.9 to 1.3 wt %.

5. The glass substrate according to claim 1 wherein the CoO concentration is in the range of 60 to 130 ppm.

6. The glass substrate according to claim 1 wherein the redox is in the range of 0.35 to 0.55.

7. The glass substrate according to claim 1 wherein the glass composition has a total solar ultraviolet transmittance (TSUV) of 40 percent or less, a total solar infrared transmittance (TSIR) of 25 percent or less and a total solar energy (TSET) transmittance of 40 percent or less, and the color of the glass is characterized by a dominant wavelength in the range of 482 to 487 nanometers and an excitation purity of 8 to 30 percent at a thickness of 0.160 inches (4.06 mm).

8. The glass substrate according to claim 1 wherein the Er 2 O 3 has a wt % in the range of 0.05 to 1 wt %.

9. The glass substrate according to claim 1 wherein the Er 2 O 3 has a wt % in the range of 0.05 to 1 wt % and the Cr 2 O 3 has a ppm in the range of 10 to 100 ppm.

10. The glass substrate according to claim 1 comprising CuO in the range of 0.001 to 0.3 wt %.

11. The glass substrate according to claim 10 wherein the Er 2 O 3 has a wt % in the range of 0.05 to 1 wt % the Cr 2 O 3 has a ppm in the range of 10 to 100 ppm and the CuO has a wt % in the range of 0.01 to 0.2 wt %.

12. A blue colored, infrared and ultraviolet radiation absorbing glass composition having a composition comprising a base glass portion selected from one of the following Groups:

Group 1: the base glass portion comprises:

Weight Percent

SiO 2

66 to 75;

Na 2 O

10 to 20;

CaO

 5 to 15;

MgO

 0 to 5;

Al 2 O 3

 0 to 5,

K 2 O

 0 to 5, and

Group 2: the base glass portion comprises:

Weight Percent

SiO 2

66 to 75;

Na 2 O

10 to 20;

CaO

 5 to 15;

MgO

 0 to 5;

Al 2 O 3

 0 to 5;

K 2 O

 0 to 5, and

B 2 O 3

greater than 0 to 5;

and a primary solar radiation absorbing and colorant portion

consisting essentially of:

total iron, expressed as Fe 2 O 3 , in the range of 0.60 to 2.0 weight percent (wt %);

CoO in the range of 30 to 100 parts per million (ppm);

Er 2 O 3 in the range of 0.01 to 3 wt %;

TiO 2 in the range of 0 to 0.9 wt %, and

Nd 2 O 3 in the range of 0 to 3 wt %;

wherein the glass has a redox in the range of 0.4 to 0.58, and wherein at a thickness of 0.160 inches, the glass has a luminous transmittance (LTA) of 35% up to 70%; a color characterized by a dominant wavelength in the range of 482 to 487 nanometers and an excitation purity ranging from 8 to 30 percent; a total solar ultraviolet transmittance (TSUV) of 40 percent or less; a total solar infrared transmittance (TSIR) of 25 percent or less; and a total solar energy (TSET) transmittance of 40 percent or less.

13. The composition as in claim 12 wherein, the FeO concentration is 0.20 to 0.50 wt %.

14. The composition as in claim 12 wherein the TiO 2 concentration is 0 to 0.5 wt %.

15. The composition as in claim 12 wherein the LTA is in the range of 45 to 55 wt %.

16. Transparent glass glazing panel set for mounting on an automobile vehicle, comprising:

a windshield;

front side windows;

rear side windows, and

a rear window,

wherein at least one of the front side windows, rear side windows; or rear window has the glass composition of claim 12 .

17. A blue colored, infrared and ultraviolet radiation absorbing glass substrate comprising a glass composition comprising a base glass portion and a glass colorant portion, wherein the base glass portion is a soda-lime-silica base portion, and the glass colorant portion is selected to provide a glass having chromaticity coordinates of a* in the range of −2 to −11 and b* in the range of −1 to −15, and a luminous transmittance of 35 to less than 70%, at a reference thickness of 0.160 inch (4.06 mm), wherein the colorant portion comprises:

total iron, expressed as Fe 2 O 3 , in the range of 0.60 to 2.0 weight percent (wt %);

CoO in the range of 30 to 250 parts per million (ppm);

Er 2 O 3 in the range of 0.01 to 3 wt %;

TiO 2 in the range of 0 to 0.9 wt %,

Nd 2 O 3 in the range of 0 to 3 wt %, and

NiO in the range of 1 to 100 ppm,

wherein the wt % and the ppm are based on the final glass composition.

18. The glass substrate according to claim 17 wherein Er 2 O 3 has a wt % in the range of 0.05 to 1 wt % and the NiO has a ppm of 5 to 50 ppm.