Glass compositions, laminates, and photovoltaic modules with reduced UV transmission

Abstract

A glass article including: a composition including (in mole percentage and on an oxide basis): from 65.0 to 79.0 SiO2; from 4.00 to 13.00 Al2O3; from 4.50 to 15.80 Na2O; from 0.20 to 3.50 TiO2; and from 0 to 2.00 Ce2O3. The composition is substantially free of B2O3. The glass article can exhibit a density that is less than or equal to 2.444 g / cm3. The composition can exhibit a liquidus viscosity that is greater than or equal to 200 kP. A laminate and photovoltaic module including the glass article are additionally disclosed.

Description

Attorney Docket No. SP24-107PCTGLASS ARTICLE WITH COMPOSITION TO REDUCE TRANSMISSION OF ULTRAVIOLET ELECTROMAGNETIC RADIATION WITH REDUCED DENSITY AND HIGHER LIQUIDUS VISCOSITY, LAMINATE INCLUDING THE SAME, AND PHOTOVOLTAIC MODULE INCLUDING SAMECROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of priority under 35 U.S.C. § 119 of U.S. Provisional Application No. 63 / 684,077 filed August 16, 2024, the content of which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] This disclosure pertains to glass articles with compositions that exhibit a reduction in transmission of ultraviolet electromagnetic radiation while exhibiting lower density and higher liquidus viscosity, as well as applications of the glass article including laminates and photovoltaic modules.BACKGROUND

[0003] Artificial satellites (hereinafter just “satellites”) are sent to orbit the Earth for a variety of reasons. Some of the satellites include transmission and / or reception, sensing, temperature control, and propulsion capabilities. Such capabilities require electrical power. While some satellites generate electrical power through nuclear means (e.g., radioisotope thermoelectric generators), other satellites include solar panels that generate electrical power through the photovoltaic effect, transforming electromagnetic radiation from the Sun into electrical current.

[0004] However, there is a problem in that electromagnetic radiation from the Sun degrades the ability of the solar panels to convert usable electromagnetic radiation from the Sun into electrical power, thus lowering the efficiency of the solar panel. While that is also the case for ground based solar panels, the degradation in orbit is much more prominent, because the Earth’s atmosphere filters much of the electromagnetic radiation that would otherwise degrade efficiency before the electromagnetic radiation reaches the solar panel. The electromagnetic radiation from the Sun degrades the efficiency of the solar panel in a variety of manners, including damaging the photovoltaic cells and altering transmissivity (e.g., darkening) of the cover substrate through which usable electromagnetic radiation is supposed to transmit before encountering the photovoltaic cells. If the efficiency is sufficiently degraded, the satellite then is typically returned to Earth. A degradation of thirty percent per year in efficiency is not uncommon.Attorney Docket No. SP24-107PCT

[0005] There is a second problem in that the cost to move the satellite from Earth into orbit increases as weight of the satellite increases. Thus, reducing the weight of the satellite is a goal. Reducing the weight of the solar panel would reduce the weight of the satellite and, thus, work toward that goal. The cover glass of the solar panel is typically one of the heaviest components.

[0006] Not just in space, Earth based solar panels pose similar problems as well. Although the Earth’s atmosphere prevents much electromagnetic radiation from the Sun that would degrade photovoltaic cells from reaching Earth based solar panels, some such electromagnetic radiation still reaches the solar panels and degrades efficiency over time. Further, weight of solar panels is a problem due to resource usage, shipping, and associated costs.

[0007] There is a third problem in that some glass compositions formulated to reduce the transmission of ultraviolet electromagnetic radiation therethrough have a liquidus viscosity that is too low (e.g., is too runny) to permit fusion formation of a glass article from the glass composition.SUMMARY

[0008] The present disclosure addresses those problems with a glass article including a composition that reduces transmission of ultraviolet electromagnetic radiation while exhibiting either a decreased density or an increased liquidus viscosity, or both.

[0009] According to a first aspect of the present disclosure, a glass article comprises: a composition comprising (in mole percentage and on an oxide basis): from 65.0 to 79.0 SiCh; from 4.00 to 13.00 AI2O3; from 4.50 to 15.80 Na?O; from 0.20 to 3.50 TiCE; and from 0 to 2.00 Ce2C>3, wherein, the composition is substantially free of B2O3.

[0010] According to a first aspect of the present disclosure, a glass article comprises: a composition comprising (in mole percentage and on an oxide basis): from 65.0 to 79.0 SiCh; from 4.0 to 13.0 AI2O3; from 4.50 to 15.80 Na2O; from 0.20 to 3.50 TiCE; and from 0 to 2.0 Ce2C>3, wherein, the composition is substantially free of B2O3.

[0011] According to a second aspect of the present disclosure, the glass article of the first aspect is presented, wherein the composition comprises: from 2.00 to 3.50 MgO; from 1.00 to 4.00 CaO; and from >0 to 5.00 K2O.

[0012] According to a second aspect of the present disclosure, the glass article of the first aspect is presented, wherein the composition comprises: from 2.00 to 3.50 MgO; from 1.0 to 4.0 CaO; and from >0 to 5.0 K2O.Attorney Docket No. SP24-107PCT

[0013] According to a third aspect of the present disclosure, the glass article of any one of the first through second aspects is presented, wherein the composition further comprises from 0 to 1.30 ZnO.

[0014] According to a fourth aspect of the present disclosure, the glass article of any one of the first through third aspects is presented, wherein the composition comprises from >0 to 0.75 CeO2.

[0015] According to a fifth aspect of the present disclosure, the glass article of any one of the first through fourth aspects is presented, wherein the composition comprises: from 0.75 to 1.75 TiO2and from 0.50 to 1.00 CeO2.

[0016] According to a sixth aspect of the present disclosure, the glass article of any one of the first through fourth aspects is presented, wherein the composition comprises: from 1.50 to 3.00 TiO2and from 0 to 0.50 CeO2.

[0017] According to a seventh aspect of the present disclosure, the glass article of any one of the first through sixth aspects is presented, wherein the composition comprises: from 70.0 to 79.0 SiO2; from 4.50 to 8.50 Al2Os; from 2.00 to 3.50 MgO; from 1.80 to 2.90 CaO; from 0 to 1.50 ZnO; from 4.50 to 12.00 Na2O; and from 0 to 5.50 K2O.

[0018] According to a seventh aspect of the present disclosure, the glass article of any one of the first through sixth aspects is presented, wherein the composition comprises: from 70.0 to 79.0 SiO2; from 4.50 to 8.50 Al2Os; from 2.0 to 3.50 MgO; from 1.80 to 2.90 CaO; from 0 to 1.50 ZnO; from 4.5 to 12.0 Na2O; and from 0 to 5.50 K2O.

[0019] According to an eighth aspect of the present disclosure, the glass article of any one of the first through seventh aspects is presented, wherein the composition is substantially free of K2O.

[0020] According to a ninth aspect of the present disclosure, the glass article of any one of the first through eighth aspects is presented, wherein the composition is substantially free of Li2O.

[0021] According to a tenth aspect of the present disclosure, the glass article of any one of the first through ninth aspects is presented, wherein the glass article exhibits a density that is less than or equal to 2.444 g / cm3.

[0022] According to an eleventh aspect of the present disclosure, the glass article of the tenth aspect is presented, wherein the density that the glass article exhibits is less than or equal to 2.430 g / cm3.Attorney Docket No. SP24-107PCT

[0023] According to a twelfth aspect of the present disclosure, the glass article of any one of the first through eleventh aspects is presented, wherein the composition exhibits a liquidus viscosity that is greater than or equal to 200 kP.

[0024] According to a thirteenth aspect of the present disclosure, the glass article of the twelfth aspect is presented, wherein the liquidus viscosity that the composition exhibits is greater than or equal to 350 kP.

[0025] According to a fourteenth aspect of the present disclosure, a glass article comprises: a composition (in mole percentage and on an oxide basis) comprising: from 55.0 to 67.0 SiCh; from 15.00 to 18.25 AI2O3; from >0 to 5.00 P2O5; from 2.50 to 5.00 B2O3; from >0 to 1.50 MgO; and from >0 to 0.25 TiCh.

[0026] According to a fifteenth aspect of the present disclosure, the glass article of the fourteenth aspect is presented, wherein the composition further comprises: from >0 to 2.50 CaO; from >0 to 2.00 SrO; from 6.50 to 8.00 Li2O; and from >0 to 0.50 K2O.

[0027] According to a sixteenth aspect of the present disclosure, the glass article of any one of the fourteenth through fifteenth aspects is presented, wherein the glass article exhibits a density that is less than or equal to 2.440 g / cm3.

[0028] According to a seventeenth aspect of the present disclosure, the glass article of any one of the fourteenth through sixteenth aspects is presented, wherein the composition exhibits a liquidus viscosity that is greater than or equal to 50 kP.

[0029] According to an eighteenth aspect of the present disclosure, a glass article comprises: a composition comprising (in mole percentage and on an oxide basis): from 58.0 to 79.0 SiCh; from 4.50 to 18.20 AI2O3; from 0 to 2.00 P2O5; from 0 to 9.00 B2O3; from >0 to 3.00 MgO; from >0 to 9.00 CaO; from 0 to 1.20 SrO; from 0 to 0.10 ZnO; from 0 to 8.00 IJ2O; from 4.50 to 12.00 Na2O; from >0 to 5.00 K2O; from >0 to 2.75 TiO2; and from 0 to 1.00 CeO2, wherein, the composition exhibits a density that is less than or equal to 2.440 g / cm3.

[0030] According to a nineteenth aspect of the present disclosure, the glass article of the eighteenth aspect is presented, wherein the composition exhibits a liquidus viscosity that is greater than or equal to 50 kP.

[0031] According to a twentieth aspect of the present disclosure, a glass article comprises: a composition comprising (in mole percentage and on an oxide basis): from 64.0 to 79.0 SiCh; from 4.80 to 10.80 AI2O3; from 2.00 to 5.70 MgO; from 4.80 to 16.00 Na2O; from 0 to 5.00 K2O; from 0.50 to 3.50 TiO2; and from >0 to 0.70 CeO2, wherein, the composition exhibits a liquidus viscosity that is greater than or equal to 300 kP.Attorney Docket No. SP24-107PCT

[0032] According to a twenty-first aspect of the present disclosure, the glass article of the twentieth aspect is presented, wherein the composition is substantially free of P2O5, B2O3, Fe2C>3, and Li2O.

[0033] According to a twenty-second aspect of the present disclosure, the glass article of any one of the twentieth through twenty-first aspects are presented, wherein the composition further comprises (in mole percentage and on an oxide basis): from >0 to 1.20 ZnO.

[0034] According to a twenty-third aspect of the present disclosure, the glass article of any one of the twentieth through twenty-second aspects are presented, wherein the composition further comprises (in mole percentage and on an oxide basis): from 1.70 to 3.20 CaO.

[0035] According to a twenty-fourth aspect of the present disclosure, a laminate comprises: a first glass layer comprising the glass article of any one of the first through the twenty-third aspects; and a second glass layer laminated to the first glass layer.

[0036] According to a twenty-fifth aspect of the present disclosure, the laminate of the twenty-fourth aspect further comprises: an interlayer disposed between the first glass layer and the second glass layer; wherein, the first glass layer comprises a thickness that is less than 250 pm.

[0037] According to a twenty-sixth aspect of the present disclosure, a photovoltaic module comprises: one or more photovoltaic cells, and the glass article of any one of the first through twenty-third aspects or the laminate of any one of the twenty-fourth through twenty-fifth aspects disposed between the one or more photovoltaic cells and an external environment.

[0038] According to a twenty-seventh aspect of the present disclosure, the photovoltaic module of the twenty-sixth aspect further comprises: an encapsulant at least partially encapsulating the one or more photovoltaic cells.

[0039] Additional features and advantages will be set forth in the detailed description which follows, and in part will be readily apparent to those skilled in the art from that description or recognized by practicing the embodiments as described herein, including the detailed description which follows, the claims, as well as the appended drawings.

[0040] It is to be understood that both the foregoing general description and the following detailed description are merely exemplary, and are intended to provide an overview or framework to understanding the nature and character of the claims. The accompanying drawings are included to provide a further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate one or more embodiments, and together with the description serve to explain principles and operation of the various embodiments.Attorney Docket No. SP24-107PCTBRIEF DESCRIPTION OF THE DRAWINGS

[0041] In the Drawings:

[0042] FIG. l is a perspective view of a glass article of the present disclosure;

[0043] FIG. 2 is a perspective view of a laminate with the glass article as a first glass layer laminated to a second glass layer with an interlayer therebetween;

[0044] FIG. 3 is an elevational view of a cross-section of the laminate taken through line III- III of FIG. 2;

[0045] FIG. 4 is a perspective view of a photovoltaic module, illustrating photovoltaic cells and the glass article disposed between an external environment and the photovoltaic cells;

[0046] FIG. 5 is a plan view of the photovoltaic module, illustrating a frame around a perimeter of a package that includes the substrate and the photovoltaic cells;

[0047] FIG. 6 is an elevational view of a cross-section of the photovoltaic module taken through line VI- VI of FIG. 5, illustrating the package held within a C-channel of the frame;

[0048] FIG. 7 is a magnified view of area VII of FIG. 6, illustrating the package further including a backsheet that, together with the substrate, sandwiches the photovoltaic cells; and

[0049] FIG. 8, pertaining to various Examples, is a graph of transmission spectra, illustrating that, for compositions including a certain mole percentage of TiCh, the transmission of electromagnetic radiation throughout the ultraviolet wavelength range of from about 290 nm to about 310 nm decreases as the mole percentage of CeCh increases.DETAILED DESCRIPTION

[0050] Reference will now be made in detail to the present preferred embodiments, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

[0051] Referring to FIG. 1, a glass article 10 is herein disclosed. The glass article 10 includes a composition. The glass article 10 can include a first primary surface 12 and a second primary surface 14. The first primary surface 12 and the second primary surface 14 can be generally planar and parallel to each other but face in opposite directions.First Set of Embodiments

[0052] In a first set of embodiments, the composition includes (in mole percentage and on an oxide basis): from 65.0 to 79.0 SiCh, from 4.00 to 13.00 AI2O3, from 4.50 to 15.80 Na2O, from 0.20 to 3.50 TiCh, from 0 to 2.00 Ce2Os, and is substantially free of B2O3. “Substantially free” for purposes of this disclosure means that the mentioned oxide, here B2O3, is not intentionally included in the composition but might be present therein due toAttorney Docket No. SP24-107PCT contamination or manufacturing imprecision in a trace amount (e.g., less than 0.001 mol%). In some instances, the composition further includes from 2.00 to 3.50 MgO. In some instances, the composition further includes from 1.00 to 4.00 CaO. In some instances, the composition further includes from >0 to 5.00 K2O. In some instances, the composition further includes from 0 to 1.30 ZnO. In some instances, the composition includes from >0 to 0.75 CeCh. In some instances, the composition includes both (i) from 0.75 to 1.75 TiCh and (ii) from 0.50 to 1.00 CeCh. In some instances, the composition includes both (i) from 1.50 to 3.00 TiCh and (ii) from 0 to 0.50 CeCh. In some instances, the composition includes from 70.0 to 79.0 SiO2, from 4.50 to 8.50 AI2O3, from 2.00 to 3.50 MgO, from 1.80 to 2.90 CaO, from 0 to 1.50 ZnO, from 4.50 to 12.00 Na2O, and from 0 to 5.50 K2O. In some instances, the composition is substantially free of K2O. In some instances, the composition is substantially free of P2O5. In some instances, the composition is substantially free of SrO. In some instances, the composition is substantially free of Li2O.

[0053] Silicon dioxide, SiO2, is the primary glass former of the composition. The composition, as mentioned, can include from 65.0 mol% to 79.0 mol% SiO2. For example, the composition can include a mole percentage of SiCh of 65.0, 66.0, 67.0, 68.0, 69.0, 70.0, 71.0, 72.0, 73.0, 74.0, 75.0, 76.0, 77.0, 78.0, 79.0, or within any range bound by any two of those values (e.g., from 66.0 to 78.0, from 66.0 to 69.0, from 70.0 to 79.0, and so on).

[0054] Alumina, AI2O3, is another glass former present in the composition. The composition, as mentioned, can include from 4.00 mol% to 13.00 mol% AI2O3. For example, the composition can include a mole percentage of AI2O3 of 4.00, 4.50, 5.00, 5.50, 6.00, 6.50, 7.00, 7.50, 8.00, 8.50, 9.00, 9.50, 10.00, 10.50, 11.00, 11.30, 11.50, 12.00, 12.50, 13.00, or within any range bound by any two of those values (e.g., from 4.50 to 11.50, from 6.00 to10.50, from 4.50 to 8.50, and so on).

[0055] Sodium oxide, Na2O, is present as a modifier in the composition. The composition, as mentioned, can include from 4.50 to 15.80 Na2O. For example, the composition can include a mole percentage of Na2O of 4.50, 5.00, 5.50, 6.00, 6.50, 7.00, 7.50, 8.00, 8.50, 9.00, 9.50, 10.00, 10.50, 11.00, 11.50, 12.00, 12.50, 13.00, 13.50, 14.00, 14.50, 15.00, 15.50, 15.80, or within any range bound by any two of those values (e.g., from 4.50 to 12.00, from 4.50 to15.50, from 13.00 to 15.50, and so on).

[0056] Titanium dioxide, TiCh, is present as a glass former and / or a modifier in the composition. In particular, the presence of TiCh in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition, as mentioned, can include from 0.20 to 3.30 TiCh. For example, theAttorney Docket No. SP24-107PCT composition can include a mole percentage of TiCh of 0.20, 0.40, 0.60, 0.70, 0.75, 0.80, 1.00, 1.20, 1.40, 1.60, 1.70, 1.75, 1.80, 2.00, 2.10, 2.20, 2.40, 2.50, 2.60, 2.70, 2.80, 3.00, 3.20, 3.30, or within any range bound by any two of those values (e.g., from 0.30 to 2.70, from 0.70 to 3.30, from 0.75 to 1.75, from 1.50 to 3.00, and so on).

[0057] Cerium oxide, CeCh, can be present as a modifier in the composition. In particular, the presence of CeCh in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition, as mentioned, can include from 0 to 2.00 CeCh. For example, the composition can include a mole percentage of CeCh of 0, greater than 0, 0.05, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.75, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, or within any range bound by any two of those values (e.g., from 0.20 to 1.70, from 0.20 to 0.90, from >0 to 0.75, from 0.50 to 1.00, from 0 to 0.50, and so on). The composition can be substantially free, or free, of CeCh.

[0058] Magnesium oxide, MgO, can be present as a modifier in the composition. The composition, as mentioned, can include from 2.00 to 3.50 MgO. For example, the composition can include a mole percentage of MgO of 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, 3.40, 3.50, or within any range bound by any two of those values (e.g., from 2.00 to 3.50, from 2.10 to 3.40, from 2.10 to 2.40, and so on). The composition can be substantially free, or free, of MgO.

[0059] Calcium oxide, CaO, can be present as a modifier in the composition. The composition, as mentioned, can include from 1.00 to 4.00 CaO. For example, the composition can include a mole percentage of CaO of 1.00, 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, 2.75, 3.00, 3.25, 3.50, 3.75, 4.00, or within any range bound by any two of those values (e.g., from 1.75 to 3.00, from 1.25 to 3.75, from 2.50 to 3.50, and so on). The composition can be substantially free, or free, of CaO.

[0060] Potassium oxide, K2O, can be present as a modifier in the composition. The composition can include from 0 to 5.50 K2O. For example, the composition can include a mole percentage of K2O of 0, greater than 0, 0.50, 1.00, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00, 5.50, or within any range bound by any two of those values (e.g., from 0 to 1.00, from 0 to 0.50, from 0 to 5.50 and so on). The composition can be substantially free, or free, ofK2O.

[0061] Zinc oxide, ZnO, can be present as a glass former and / or a modifier in the composition. In particular, the presence of ZnO in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10.Attorney Docket No. SP24-107PCT The composition, as mentioned, can include from 0 to 1.50 ZnO. For example, the composition can include a mole percentage of ZnO of 0, greater than 0, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, or within any range bound by any two of those values (e.g., from 0 to 1.20, from 0.50 to 0.80, and so on). The composition can be substantially free, or free, of ZnO.

[0062] Tin dioxide, SnO2, can be present as a glass former and / or a modifier in the composition. The composition can include from 0 to 0.25 SnO2. For example, the composition can include a mole percentage of SnO2 of 0, greater than 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, or within any range bound by any two of those values (e.g., from 0.01 to 0.05, from greater than 0 to 0.03, and so on). The composition can be substantially free, or free, of SnCh.

[0063] Iron oxide, Fe20s, can be present as a glass former and / or a modifier in the composition. The presence of Fe20s in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition can include from 0 to 0.05 Fe20s. For example, the composition can include a mole percentage of Fe20s of 0, greater than 0, 0.01, 0.02, 0.03, 0.04, 0.05, or within any range bound by any two of those values (e.g., from 0.01 to 0.05, from greater than 0 to 0.03, and so on). The composition can be substantially free, or free, of Fe20s.

[0064] The glass article 10, when formed of the composition of the first set of embodiments, exhibits a density that is less than or equal to 2.444 g / cm3, such as less than or equal to 2.430 g / cm3. For example, the density can be 2.410 g / cm3, 2.412 g / cm3, 2.414 g / cm3, 2.416 g / cm3, 2.418 g / cm3, 2.420 g / cm3, 2.422 g / cm3, 2.424 g / cm3, 2.426 g / cm3, 2.428 g / cm3, 2.430 g / cm3, 2.432 g / cm3, 2.434 g / cm3, 2.436 g / cm3, 2.438 g / cm3, 2.440 g / cm3, 2.442 g / cm3, 2.444, g / cm3, or within any range bound by any two of those values (e.g., from 2.410 g / cm3to 2.444 g / cm3, from 2.418 g / cm3to 2.430 g / cm3, and so on). The density can be greater than 2.444 g / cm3.

[0065] The composition of the first set of embodiments exhibits a liquidus viscosity. The liquidus viscosity can be greater than or equal to 200 kP, such as greater than or equal to 350 kP. For example, the liquidus viscosity can be 200 kP, 250 kP, 300 kP, 350 kP, 400 kP, 450 kP, 500 kP, 550 kP, 600 kP, 650 kP, 700 kP, 750 kP, 800 kP, 850 kP, 900 kP, 950 kP, 1000 kP, 1050 kP, 1100 kP, 1150 kP, 1200 kP, or within any range bound by any two of those values (e.g., from 200 kP to 1200 kP, from 300 kP to 550 kP, and so on). The liquidus viscosity can be less than 200kP or greater than 1200 kP.Attorney Docket No. SP24-107PCTSecond Set of Embodiments

[0066] In a second set of embodiments, the composition includes (in mole percentage and on an oxide basis): from 55.0 to 67.0 SiCh; from 15.00 to 18.25 AI2O3; from >0 to 5.00 P2O5; from 2.50 to 5.00 B2O3; from >0 to 1.50 MgO; and from >0 to 0.25 TiCh. In some instances, the composition further includes from >0 to 2.50 CaO. In some instances, the composition further includes from >0 to 2.00 SrO. In some instances, the composition further includes from 6.50 to 8.00 Li2O. In some instances, the composition further includes from >0 to 0.50 K2O. In some instances, the composition is substantially free of ZnO. In some instances, the composition is substantially free of CeCh.

[0067] Silicon dioxide, SiCh, is the primary glass former of the composition. The composition, as mentioned, can include from 55.0 mol% to 67.0 mol% SiCh. For example, the composition can include a mole percentage of SiCh of 55.0, 56.0, 57.0, 58.0, 59.0, 60.0, 61.0, 62.0, 63.0, 64.0, 65.0, 66.0, or 67.0, or within any range bound by any two of those values (e.g., from 56.0 to 55.0, from 62.0 to 64.0, and so on).

[0068] Alumina, AI2O3, is another glass former present in the composition. The composition, as mentioned, can include from 14.00 mol% to 18.25 mol% AI2O3. For example, the composition can include a mole percentage of AI2O3 of 14.00, 14.25, 14.50, 14.75, 15.00,15.25, 15.50, 15.75, 16.00, 16.25, 16.50, 16.75, 17.00, 17.25, 17.50, 17.75, 18.00, 18.25, or within any range bound by any two of those values (e.g., from 14.50 to 16.50, from 15.00 to17.25, and so on).

[0069] Phosphorous pentoxide, P2O5, is another glass former present in the composition. The composition, as mentioned, includes from >0 to 5.00 P2O5. For example, the composition can include a mole percentage of P2O5 of greater than 0, 0.20, 0.40, 0.60, 0.80, 1.00, 1.20, 1.40, 1.60, 1.80, 2.00, 2.20, 2.40, 2.60, 2.80, 3.00, 3.20, 3.40, 3.60, 3.80, 4.00, 4.20, 4.40, 4.60, 4.80, 5.00, or within any range bound by any two of those values (e.g., from >0 to 2.40, from 0.40 to 1.40, and so on).

[0070] Boron oxide, B2O3, is another glass former present in the composition. The composition, as mentioned, can include from 2.50 to 5.00 mol% B2O3. For example, the composition can include a mole percentage of B2O3 of 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, 3.40, 3.50, 3.60, 3.70, 3.80, 3.90, 4.00, 4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70,4.80, 4.90, 5.00, or within any range bound by any two of those values (e.g., from 2.50 to3.80, from 4.10 to 4.60, and so on).

[0071] Magnesium oxide, MgO, is present as a modifier in the composition. The composition, as mentioned, can include from >0 to 1.50 MgO. For example, the compositionAttorney Docket No. SP24-107PCT can include a mole percentage of MgO of greater than 0, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, or within any range bound by any two of those values (e.g., from 0.30 to 1.00, from 0.50 to 1.40, and so on).

[0072] Titanium dioxide, TiCh, is present as a glass former and / or a modifier in the composition. In particular, the presence of TiCh in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition, as mentioned, can include from >0 to 0.25 TiCh. For example, the composition can include a mole percentage of TiCh of greater than 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, or within any range bound by any two of those values (e.g., from 0.04 to 0.18, from 0.10 to 0.22, and so on).

[0073] Calcium oxide, CaO, can be present as a modifier in the composition. The composition, as mentioned, can include from 0 to 2.50 CaO. For example, the composition can include a mole percentage of CaO of greater than 0, 0.20, 0.40, 0.60, 0.80, 1.00, 1.20, 1.40, 1.60, 1.80, 2.00, 2.20, 2.40, 2.50, or within any range bound by any two of those values (e.g., from 0.20 to 1.00, from 0.40 to 2.40, and so on). The composition can be substantially free, or free, of CaO.

[0074] Strontium oxide, SrO, can be present as a modifier in the composition. The composition, as mentioned, can include from >0 to 2.00 SrO. For example, the composition can include a mole percentage of SrO of greater than 0, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, or within any range bound by any two of those values (e.g., from 0.20 to 0.80, from 0.50 to 1.10, and so on). The composition can be substantially free, or free, of SrO.

[0075] Lithium oxide, Li2O, can be present as a modifier in the composition. The composition, as mentioned, can include from 6.50 to 8.00 Li2O. For example, the composition can include a mole percentage of Li2O of 6.50, 6.60, 6.70, 6.80, 6.90, 7.00, 7.10, 7.20, 7.30, 7.40, 7.50, 7.60, 7.70, 7.80, 7.90, 8.00, or within any range bound by any two of those values (e.g., from 6.60 to 7.70, from 7.00 to 7.80, and so on). The composition can be substantially free, or free, of Li2O.

[0076] Potassium oxide, K2O, can be present as a modifier in the composition. The composition, as mentioned, can include from >0 to 0.50 K2O. For example, the composition can include a mole percentage of K2O greater than 0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, or within any range bound by any two of those values (e.g., from 0.20 toAttorney Docket No. SP24-107PCT 0.30, from 0.10 to 0.35, and so on). The composition can be substantially free, or free, of K2O.

[0077] Tin dioxide, SnCh, can be present as a glass former and / or a modifier in the composition. The composition can include from 0 to 0.25 SnCh. For example, the composition can include a mole percentage of SnCh of 0, greater than 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, or within any range bound by any two of those values (e.g., from 0.01 to 0.05, from greater than 0 to 0.03, and so on). The composition can be substantially free, or free, of SnCh.

[0078] Iron oxide, Fe20s, can be present as a glass former and / or a modifier in the composition. The presence of Fe20s in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition can include from 0 to 0.05 Fe20s. For example, the composition can include a mole percentage of Fe20s of 0, greater than 0, 0.01, 0.02, 0.03, 0.04, 0.05, or within any range bound by any two of those values (e.g., from 0.01 to 0.05, from greater than 0 to 0.03, and so on). The composition can be substantially free, or free, of Fe20s.

[0079] The glass article 10, when formed of the composition of the second set of embodiments, can exhibit a density that is less than or equal to 2.440 g / cm3, such as less than or equal to 2.420 g / cm3. For example, the density can be 2.390 g / cm3, 2.392 g / cm3, 2.394 g / cm3, 2.396 g / cm3, 2.398 g / cm3, 2.400 g / cm3, 2.402 g / cm3, 2.404 g / cm3, 2.406 g / cm3, 2.408 g / cm3, 2.410 g / cm3, 2.412 g / cm3, 2.414 g / cm3, 2.416 g / cm3, 2.418 g / cm3, 2.420 g / cm3, 2.422 g / cm3, 2.424 g / cm3, 2.426 g / cm3, 2.428 g / cm3, 2.430 g / cm3, 2.432 g / cm3, 2.434 g / cm3, 2.436 g / cm3, 2.438 g / cm3, 2.440 g / cm3, or within any range bound by any two of those values (e.g., from 2.424 g / cm3to 2.434 g / cm3, from 2.418 g / cm3to 2.430 g / cm3, and so on). The density can be greater than 2.440 g / cm3.

[0080] The composition of the second set of embodiments exhibits a liquidus viscosity. The liquidus viscosity can be greater than or equal to 50 kP, such as greater than or equal to 100 kP. For example, the liquidus viscosity can be 50 kP, 60 kP, 70 kP, 80 kP, 90 kP, 100 kP, 110 kP, 120 kP, 130 kP, 140 kP, 150 kP, or within any range bound by any two of those values (e.g., from 60 kP to 100 kP, from 80 kP to 140 kP, and so on). The liquidus viscosity can be less than 50 or greater than 150 kP.Attorney Docket No. SP24-107PCTThird Set of Embodiments

[0081] In a third set of embodiments, the composition includes (in mole percentage and on an oxide basis): from 58.0 to 79.0 SiCh; from 4.50 to 18.20 AI2O3; from 0 to 2.00 P2O5; from 0 to 9.00 B2O3; from >0 to 3.00 MgO; from >0 to 9.00 CaO; from 0 to 1.20 SrO; from 0 to 0.10 ZnO; from 0 to 8.00 Li2O; from 4.50 to 12.00 Na2O; from >0 to 5.00 K2O; from >0 to 2.75 TiCh; and from 0 to 1.00 CeCh.

[0082] Silicon dioxide, SiCh, is the primary glass former of the composition. The composition, as mentioned, can include from 58.0 mol% to 79.0 mol% SiCh. For example, the composition can include a mole percentage of SiCh of 58.0, 59.0, 60.0, 61.0, 62.0, 63.0, 64.0, 65.0, 66.0, 67.0, 68.0, 68.5, 69.0, 70.0, 71.0, 71.5, 72.0, 73.0, 74.0, 75.0, 76.0, 77.0, 78.0, 79.0, or within any range bound by any two of those values (e.g., from 66.0 to 78.0, from 66.0 to 69.0, from 70.0 to 79.0, and so on).

[0083] Alumina, AI2O3, is another glass former present in the composition. The composition, as mentioned, can include from 4.50 mol% to 18.20 mol% AI2O3. For example, the composition can include a mole percentage of AI2O3 of 4.50, 5.00, 5.50, 6.00, 6.50, 7.00,7.50, 8.00, 8.50, 9.00, 9.50, 10.00, 10.50, 11.00, 11.30, 11.50, 12.00, 12.50, 13.00, 13.50, 14.00, 14.50, 15.00, 15.50, 16.00, 16.50, 17.00, 17.50, 18.00, 18.20, or within any range bound by any two of those values (e.g., from 4.50 to 11.50, from 6.00 to 10.50, from 4.50 to8.50, and so on).

[0084] Magnesium oxide, MgO, is present as a modifier in the composition. The composition, as mentioned, includes from >0 to 3.00 MgO. For example, the composition can include a mole percentage of MgO of 0, greater than 0, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, or within any range bound by any two of those values (e.g., from 0.30 to 1.00, from 0.50 to 1.40, and so on).

[0085] Calcium oxide, CaO, is present as a modifier in the composition. The composition, as mentioned, includes from >0 to 9.00 CaO. For example, the composition can include a mole percentage of CaO of greater than 0, 0.50, 1.00, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00,5.50, 6.00, 6.50, 7.00, 7.50, 8.00, 8.50, 9.00, or within any range bound by any two of those values (e.g., from 1.00 to 4.00, from 4.50 to 7.50, and so on).

[0086] Phosphorous pentoxide, P2O5, is another glass former that can be present in the composition. The composition, as mentioned, includes from 0 to 2.00 P2O5. For example, the composition can include a mole percentage of P2O5 of 0, greater than 0, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90,Attorney Docket No. SP24-107PCT 2.00, or within any range bound by any two of those values (e.g., from 0 to 1.40, from 0.40 to 1.40, and so on). The composition can be substantially free of, or free of, P2O5.

[0087] Boron oxide, B2O3, is another glass former that can be present in the composition. The composition, as mentioned, can include from 0 to 9.00 mol% B2O3. For example, the composition can include a mole percentage of B2O3 of 0, greater than 0, 0.50, 1.00, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00, 5.50, 6.00, 6.50, 7.00, 7.50, 8.00, 8.50, 9.00, or within any range bound by any two of those values (e.g., from 1.00 to 3.00, from 2.50 to 6.50, and so on). The composition can be substantially free of, or free of, B2O3.

[0088] Sodium oxide, Na2O, is present as a modifier in the composition. The composition, as mentioned, can include from 4.50 to 12.00 Na2O. For example, the composition can include a mole percentage of Na2O of 4.50, 5.00, 5.50, 6.00, 6.50. 7.00, 7.50, 8.00, 8.50, 9.00, 9.50, 10.00, 10.50, 11.00, 11.50, 12.00, or within any range bound by any two of those values (e.g., from 4.50 to 9.00, from 5.50 to 10.50, and so on).

[0089] Potassium oxide, K2O, is present as a modifier in the composition. The composition, as mentioned, includes from >0 to 5.00 K2O. For example, the composition can include a mole percentage of K2O greater than 0, 0.25, 0.50, 0.75, 1.00, 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, 2.75, 3.00, 3.25, 3.50, 3.75, 4.00, 4.25, 4.50, 4.75, 5.00, or within any range bound by any two of those values (e.g., from 1.25 to 2.25, from 2.00 to 4.75, and so on).

[0090] Titanium dioxide, TiCh, is present as a glass former and / or a modifier in the composition. In particular, the presence of TiCh in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition, as mentioned, can include from >0 to 2.75 TiCh. For example, the composition can include a mole percentage of TiCh of greater than 0, 0.25, 0.50, 0.75, 1.00, 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, 2.75, or within any range bound by any two of those values (e.g., from 0.75 to 2.25, from 1.25 to 2.00, and so on).

[0091] Strontium oxide, SrO, can be present as a modifier in the composition. The composition, as mentioned, can include from 0 to 1.20 SrO. For example, the composition can include a mole percentage of SrO of 0, greater than 0, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, or within any range bound by any two of those values (e.g., from 0.20 to 0.80, from 0.50 to 1.10, and so on). The composition can be substantially free, or free, of SrO.

[0092] Zinc oxide, ZnO, can be present as a glass former and / or a modifier in the composition. In particular, the presence of ZnO in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10.Attorney Docket No. SP24-107PCT The composition, as mentioned, can include from 0 to 0.10 ZnO. For example, the composition can include a mole percentage of ZnO of 0, greater than 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, or within any range bound by any two of those values (e.g., from >0 to 0.05, from 0.03 to 0.09, and so on). The composition can be substantially free, or free, of ZnO.

[0093] Lithium oxide, Li2O, can be present as a modifier in the composition. The composition, as mentioned, can include from 0 to 8.00 Li2O. For example, the composition can include a mole percentage of Li2O of 0, >0, 0.50, 1.00, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00, 4.50, 5.00, 5.50, 6.00, 6.50, 7.00, 7.50, 8.00, or within any range bound by any two of those values (e.g., from 1.50 to 4.50, from 2.00 to 7.00, and so on). The composition can be substantially free, or free, of Li2O.

[0094] Cerium oxide, CeCh, can be present as a modifier in the composition. In particular, the presence of CeCh in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition, as mentioned, can include from 0 to 1.00 CeCh. For example, the composition can include a mole percentage of CeCh of 0, greater than 0, 0.05, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, or within any range bound by any two of those values (e.g., from 0.20 to 0.70, from 0.20 to 0.90, and so on). The composition can be substantially free, or free, of CeO2.

[0095] Tin dioxide, SnCh, can be present as a glass former and / or a modifier in the composition. The composition can include from 0 to 0.25 SnCh. For example, the composition can include a mole percentage of SnCh of 0, greater than 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, or within any range bound by any two of those values (e.g., from 0.01 to 0.05, from greater than 0 to 0.03, and so on). The composition can be substantially free, or free, of SnCh.

[0096] Iron oxide, Fe20s, can be present as a glass former and / or a modifier in the composition. The presence of Fe20s in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition can include from 0 to 0.05 Fe20s. For example, the composition can include a mole percentage of Fe20s of 0, greater than 0, 0.01, 0.02, 0.03, 0.04, 0.05, or within any range bound by any two of those values (e.g., from 0.01 to 0.05, from greater than 0 to 0.03, and so on). The composition can be substantially free, or free, of Fe20s.Attorney Docket No. SP24-107PCT

[0097] The glass article 10, when formed of the composition of the third set of embodiments, can exhibit a density that is less than or equal to 2.440 g / cm3, such as less than or equal to 2.420 g / cm3, such as less than or equal to 2.410 g / cm3. For example, the density can be 2.390 g / cm3, 2.392 g / cm3, 2.394 g / cm3, 2.396 g / cm3, 2.398 g / cm3, 2.400 g / cm3, 2.402 g / cm3, 2.404 g / cm3, 2.406 g / cm3, 2.408 g / cm3, 2.410 g / cm3, 2.412 g / cm3, 2.414 g / cm3, 2.416 g / cm3, 2.418 g / cm3, 2.420 g / cm3, 2.422 g / cm3, 2.424 g / cm3, 2.426 g / cm3, 2.428 g / cm3, 2.430 g / cm3, 2.432 g / cm3, 2.434 g / cm3, 2.436 g / cm3, 2.438 g / cm3, 2.440 g / cm3, or within any range bound by any two of those values (e.g., from 2.424 g / cm3to 2.434 g / cm3, from 2.418 g / cm3to 2.430 g / cm3, and so on). The density can be greater than 2.440 g / cm3.

[0098] The composition of the third set of embodiments exhibits a liquidus viscosity. The liquidus viscosity can be greater than or equal to 50 kP, such as greater than or equal to 100 kP. For example, the liquidus viscosity can be 50 kP, 60 kP, 70 kP, 80 kP, 90 kP, 100 kP, 110 kP, 120 kP, 130 kP, 140 kP, 150 kP, or within any range bound by any two of those values (e.g., from 60 kP to 100 kP, from 80 kP to 140 kP, and so on). The liquidus viscosity can be less than 50 or greater than 150 kP.Fourth Set of Embodiments

[0099] In a fourth set of embodiments, the composition includes (in mole percentage and on an oxide basis): from 64.0 to 79.0 SiCh; from 4.80 to 10.80 AI2O3; from 2.00 to 5.70 MgO; from 4.80 to 16.00 Na?O; from 0 to 5.00 K2O; from 0.50 to 3.50 TiCh; and from >0 to 0.70 CeCh. In some instances, the composition further includes from 1.80 to 3.00 CaO. In some instances, the composition further includes from greater than 0 to 1.20 ZnO. In some instances, the composition is substantially free of, or free of, P2O5. In some instances, the composition is substantially free of, or free of, B2O5. In some instances, the composition is substantially free of, or free of, SrO. In some instances, the composition is substantially free of, or free of, Li2O. In some instances, the composition is substantially free of, or free of, Fe2C>3.

[0100] Silicon dioxide, SiCh, is the primary glass former of the composition. The composition, as mentioned, can include from 64.0 mol% to 79.0 mol% SiCh. For example, the composition can include a mole percentage of SiCh of 64.0, 64.5, 65.0, 65.5, 66.0, 66.5, 67.0, 67.5, 68.0, 68.5, 69.0, 69.5, 70.0, 70.5, 71.0, 71.5, 72.0, 72.5, 73.0, 73.5, 74.0, 74.5, 75.0, 75.5, 76.0, 76.5, 77.0, 77.5, 78.0, 78.5, 79.0, or within any range bound by any two of those values (e.g., from 65.0 to 68.0, from 75.5 to 77.5, and so on).

[0101] Alumina, AI2O3, is another glass former present in the composition. The composition, as mentioned, can include from 4.80 mol% to 10.80 mol% AI2O3. For example,Attorney Docket No. SP24-107PCT the composition can include a mole percentage of AI2O3 of 4.80, 4.90, 5.00, 5.10, 5.20, 5.30, 5.40, 5.50, 5.60, 5.70, 5.80, 5.90, 6.00, 6.10, 6.20, 6.30, 6.40, 6.50, 6.60, 6.70, 6.80, 6.90, 7.00, 7.10, 7.20, 7.30, 7.40, 7.50, 7.60, 7.70, 7.80, 7.90, 8.00, 8.10, 8.20, 8.30, 8.40, 8.50, 8.60, 8.70, 8.80, 8.90, 9.00, 9.10, 9.20, 9.30, 9.40, 9.50, 9.60, 9.70, 9.80, 9.90, 10.00, 10.10,10.20, 10.30, 10.40, 10.50, 10.60, 10.70, 10.80, or within any range bound by any two of those values (e.g., from 5.10 to 6.00, from 5.80 to 6.90, from 8.20 to 9.90, and so on).

[0102] Magnesium oxide, MgO, is present as a modifier in the composition. The composition, as mentioned, can include from 2.00 to 5.70 MgO. For example, the composition can include a mole percentage of MgO of greater than 2.00, 2.10, 2.30, 2.40,2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, 3.40, 3.50, 3.60, 3.70, 3.80, 3.90, 4.00,4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, 5.10, 5.20, 5.30, 5.40, 5.50, 5.60,5.70, or within any range bound by any two of those values (e.g., from 2.30 to 3.00, from2.60 to 3.20, from 3.50 to 5.20, and so on).

[0103] Sodium oxide, Na?O, is present as a modifier in the composition. The composition, as mentioned, can include from 4.80 to 16.00 Na2O. For example, the composition can include a mole percentage of Na2O of 4.80, 5.00, 5.50, 6.00, 6.50. 7.00,7.50, 8.00, 8.50, 9.00, 9.50, 10.00, 10.50, 11.00, 11.50, 12.00, 12.50, 13.00, 13.50, 14.00,14.50, 15.00, 15.50, 16.00, or within any range bound by any two of those values (e.g., from 5.50 to 12.00, from 6.50 to 11.50, from 11.50 to 15.00, and so on).

[0104] Potassium oxide, K2O, can be present as a modifier in the composition. The composition, as mentioned, includes from 0 to 5.00 K2O. For example, the composition can include a mole percentage of K2O of 0, greater than 0, 0.25, 0.50, 0.75, 1.00, 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, 2.75, 3.00, 3.25, 3.50, 3.75, 4.00, 4.25, 4.50, 4.75, 5.00, or within any range bound by any two of those values (e.g., from 1.25 to 2.25, from 2.00 to 4.75, and so on).

[0105] Titanium dioxide, TiCh, is present as a glass former and / or a modifier in the composition. In particular, the presence of TiCh in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition, as mentioned, can include from 0.50 to 3.00 TiCh. For example, the composition can include a mole percentage of TiCh of 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10,1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, or within any range bound by any two of those values (e.g., from 1.70 to 2.30, from 1.90 to 2.60, from 0.60 to 1.00, and so on).

[0106] Cerium oxide, CeCh, is present as a modifier in the composition. In particular, the presence of CeCh in the composition can absorb ultraviolet radiation and thus lowerAttorney Docket No. SP24-107PCT transmittance of ultraviolet radiation though the glass article 10. The composition, as mentioned, can include >0 to 0.70 CeCh. For example, the composition can include a mole percentage of CeCh of greater than 0, 0.05, 0.06, 0.08, 0.10, 0.12, 0.14, 0.16, 0.18, 0.20, 0.22, 0.24, 0.26, 0.28, 0.30, 0.32, 0.34, 0.36, 0.38, 0.40, 0.42, 0.44, 0.46, 0.48, 0.50, 0.52, 0.54, 0.56, 0.58, 0.60, 0.62, 0.64, 0.66, 0.68, 0.70, or within any range bound by any two of those values (e.g., from 0.08 to 0.20, from 0.16 to 0.34, from 0.52 to 0.68, and so on).

[0107] Calcium oxide, CaO, can be present as a modifier in the composition. The composition can include from 1.70 to 3.20 CaO. For example, the composition can include a mole percentage of CaO of 1.70, 1.80, 1.90, 2.00, 2.10, 2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, or within any range bound by any two of those values (e.g., from 1.90 to 2.40, from 2.20 to 2.90, and so on). The composition can be substantially free, or free, of CaO.

[0108] Zinc oxide, ZnO, can be present as a glass former and / or a modifier in the composition. In particular, the presence of ZnO in the composition can absorb ultraviolet radiation and thus lower transmittance of ultraviolet radiation though the glass article 10. The composition, as mentioned, can include from 0 to 1.20 ZnO. For example, the composition can include a mole percentage of ZnO of 0, greater than 0, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, or within any range bound by any two of those values (e.g., from 0 to 1.20, from 0.50 to 0.80, and so on). The composition can be substantially free, or free, of ZnO.

[0109] Tin dioxide, SnO2, can be present as a glass former and / or a modifier in the composition. The composition can include from 0 to 0.25 SnO2. For example, the composition can include a mole percentage of SnO2 of 0, greater than 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, or within any range bound by any two of those values (e.g., from 0.01 to 0.05, from greater than 0 to 0.03, and so on). The composition can be substantially free, or free, of SnCh.

[0110] The composition of the fourth set of embodiments exhibits a liquidus viscosity. The liquidus viscosity can be greater than or equal to 300 kP, such as greater than or equal to 500 kP, or even greater than 1000 kP. For example, the liquidus viscosity can be 300 kP, 350 kP, 400 kP, 450 kP, 500 kP, 550 kP, 600 kP, 650 kP, 700 kP, 750 kP, 800 kP, 850 kP, 900 kP, 950 kP, 1000 kP, 1050 kP, 1100 kP, or within any range bound by any two of those values (e.g., from 350 kP to 1050 kP, from 400 kP to 500 kP, and so on). The liquidus viscosity can be less than 300 or greater than 1100 kP.Attorney Docket No. SP24-107PCT

[0111] The glass article 10, when formed of the composition of the fourth set of embodiments, can exhibit a density that is less than or equal to 2.444 g / cm3, such as less than or equal to 2.440 g / cm3, such as less than or equal to 2.430 g / cm3, such as less than or equal to 2.420 g / cm3. For example, the density can be 2.400 g / cm3, 2.402 g / cm3, 2.404 g / cm3, 2.406 g / cm3, 2.408 g / cm3, 2.410 g / cm3, 2.412 g / cm3, 2.414 g / cm3, 2.416 g / cm3, 2.418 g / cm3, 2.420 g / cm3, 2.422 g / cm3, 2.424 g / cm3, 2.426 g / cm3, 2.428 g / cm3, 2.430 g / cm3, 2.432 g / cm3, 2.434 g / cm3, 2.436 g / cm3, 2.438 g / cm3, 2.440 g / cm3, 2.442 g / cm3, 2.444 g / cm3, or within any range bound by any two of those values (e.g., from 2.424 g / cm3to 2.434 g / cm3, from 2.428 g / cm3to 2.440 g / cm3, and so on). The density can be greater than 2.444 g / cm3.Laminate With the Glass article

[0112] Referring now to FIGS. 2-3, a laminate 100 includes a first glass layer 102 and a second glass layer 104. The second glass layer 104 is laminated to the first glass layer 102.

[0113] The first glass layer 102 is or includes the glass article 10 of the present disclosure. The glass article 10 forming a component or an entirety of the first glass layer 102 can have any composition falling within the first set of embodiments, the second set of embodiments, the third set of embodiments, or the fourth set of embodiments described herein. The first glass layer 102 thus reduces the transmission of ultraviolet electromagnetic radiation through the laminate 100.

[0114] The first glass layer 102 includes an outward primary surface 106 and an inward primary surface 108. The outward primary surface 106 and the inward primary surface 108 face away from each other. The first primary 12 and the second primary surface 14 of the glass article 10 can provide the outward primary surface 106 and the inward primary surface 108, respectively, of the first glass layer 102. Similarly, the second glass layer 104 includes an outward primary surface 110 and an inward primary surface 112. Again, the outward primary surface 110 and the inward primary surface 112 face away from each other. The inward primary surface 108 of the first glass layer 102 and the inward primary surface 112 of the second glass layer 104 face each other. The outward primary surface 106 and the inward primary surface 108 of the first glass layer 102, and the outward primary surface 110 and the inward primary surface 112 of the second glass layer 104, can all be planar and parallel to each other but need not be. The laminate 100 has a first primary surface 114 provided by the outward primary surface 106 of the first glass layer 102 and a second primary surface 116 provided by the outward primary surface 110 of the second glass layer 104.Attorney Docket No. SP24-107PCT

[0115] The first glass layer 102 has a thickness 118. The thickness 118 is the shortest straight-line distance between the inward primary surface 108 and the outward primary surface 106. Similarly, the second glass layer 104 has a thickness 120. The thickness 120 is the shortest straight-line distance between the inward primary surface 112 and the outward primary surface 110.

[0116] In embodiments, the thickness 118 of the first glass layer 102 is less than 250 pm. For example, the thickness 118 of the first glass layer 102 can be 20 pm, 30 pm, 40 pm, 50 pm, 60 pm, 70 pm, 80 pm, 90 pm, 100 pm, 100 pm, 120 pm, 130 pm, 140 pm, 150 pm, 160 pm, 170 pm, 180 pm, 190 pm, 200 pm, 210 pm, 220 pm, 230 pm, 250 pm, or within any range bound by any two of those values (e.g., from 40 pm to 60 pm, from 100 pm to 200 pm, and so on).

[0117] In embodiments, thickness 120 of the second glass layer 104 is greater than the thickness 118 of the first glass layer 102. For example, the thickness 120 of the second glass layer 104 can be 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm,1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm,3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5.0 mm, or within any range bound by any two of those values (e.g., from 1.8 mm to 4.5 mm, from 3.0 mm to 3.2 mm, and so on). The thickness 120 of the second glass layer 104 can be greater than 5.0 mm as well.

[0118] In embodiments, the laminate 100 further includes an interlayer 122. The interlayer 122 is disposed between the first glass layer 102 and the second glass layer 104. The interlayer 122 can contact the inward primary surface 108 of the first glass layer 102 and the inward primary surface 112 of the second glass layer 104. The interlayer 122 includes a thickness 124. The thickness 124 of the interlayer 122 is the shortest straight-line distance orthogonal to the inward primary surface 108 of the first glass layer 102. In embodiments, the thickness 124 of the interlayer 122 is within a range of from 0.30 pm to 1.00 pm. For example, the thickness 124 of the interlayer 122 can be 0.30 pm, 0.35 pm, 0.40 pm, 0.45 pm, 0.50 pm, 0.55 pm, 0.60 pm, 0.65 pm, 0.70 pm, 0.75 pm, 0.80 pm, 0.85 pm, 0.90 pm, 0.95 pm, 1.00 pm, or within any range bound by any two of those values (e.g., from 0.50 pm to 0.70 pm, from 0.55 pm to 0.95 pm, and so on).Attorney Docket No. SP24-107PCTPhotovoltaic Module

[0119] Referring now to FIGS. 4-7, a photovoltaic module 200 includes one or more photovoltaic cells 202 and the glass article 10 of the present disclosure. The glass article 10 that is a component of the photovoltaic module 200 can have any composition falling within the first set of embodiments, the second set of embodiments, the third set of embodiments, or the fourth set of embodiments described herein.

[0120] The glass article 10 is disposed between the one or more photovoltaic cells 202 and an external environment 204. In particular, the one or more photovoltaic cells 202 is disposed beneath an inward primary surface 205 of the glass article 10, such as that provided by the second primary surface 14 thereof. The glass article 10 separates the one or more photovoltaic cells 202 from the external environment 204. The glass article 10 thus reduces transmission of ultraviolet electromagnetic radiation from the external environment 204, through the glass article 10, and to the one or more photovoltaic cells 202. It should be understood that the glass article 10 can be a layer of the laminate 100 and the laminate 100 can be disposed between the one or more photovoltaic cells 202 and the external environment 204.

[0121] During use of the photovoltaic module 200, photons 206 from the Sun 208 enter the photovoltaic module 200 through the glass article 10 and impinge upon the one or more photovoltaic cells 202. The type of photovoltaic cells 202 is not particularly limited, though in preferred embodiments, the one or more photovoltaic cells 202 include monocrystalline silicon.

[0122] In embodiments, the photovoltaic module 200 further includes a backsheet 210. The one or more photovoltaic cells 202 is disposed between the glass article 10 and the backsheet 210. The backsheet 210 can have a glass composition and, indeed, can also be the glass article 10 of the present disclosure (with any of the compositions of the first set of embodiments, the second set of embodiments, the third set of embodiments, or the fourth set of embodiments). Stated another way, the glass article 10 of the present disclosure can be the glass article 10 of the photovoltaic module 200 and another glass article 10 of the present disclosure can be the backsheet 210 of the photovoltaic module 200.

[0123] Having the one or more photovoltaic cells 202 sandwiched between the glass article 10 and the backsheet 210 with transparency allows the one or more photovoltaic cells 202 to receive photons 206 transmitting through both the glass article 10 and the backsheet 210. That arrangement in theory should increase the electricity production of the photovoltaicAttorney Docket No. SP24-107PCT module 200 compared to if the one or more photovoltaic cells 202 received photons 206 transmitting only through the glass article 10 but not the backsheet 210.

[0124] In embodiments, the photovoltaic module 200 further includes an encapsulant 212 that at least partially encapsulates the one or more photovoltaic cells 202. The encapsulant 212 at least partially encapsulates the one or more photovoltaic cells 202 between the glass article 10 and the backsheet 210. The glass article 10 and the backsheet 210 thus separate the one or more photovoltaic cells 202 and the encapsulant 212 from the external environment 204. The encapsulant 212 has a composition, e.g., material that forms the encapsulant 212. In embodiments, the composition of the encapsulant 212 is one or more of ethylene-vinyl acetate (EVA), polyvinyl butyral (PVB), a silicone-based material (e.g., SYLGARD™ 184), an ionomer (e.g., DUPONT's® PV5400, PV5300, PV5200, or PV8600), a thermoplastic polyolefin (TPO) (e.g., Quentys™ BPO from Borealis), and a polyolefin elastomer (POE) (e.g., Engage™ from Dow). Other compositions for the encapsulant 212 are envisioned.

[0125] In embodiments, the photovoltaic module 200 further includes a frame 214. When the photovoltaic module 200 is oriented horizontally such that an outward primary surface 215 of the glass article 10 (e.g., the first primary surface 12) is horizontal and facing upwards, the frame 214 defines a top 216 and a bottom 218 of the photovoltaic module 200 where the top 216 is the most elevated portion of the photovoltaic module 200 and the bottom 218 is the least elevated portion of the photovoltaic module 200, excluding wiring that may extend from the photovoltaic module 200. In a more detailed example, the frame 214 includes a sidewall 220, a C-channel 222 that is contiguous with the sidewall 220, and a tab 224 that extends inward relative to the sidewall 220. The C-channel 222 is disposed at or near the top 216 of the frame 214, and the tab 224 is disposed at or near the bottom 218 of the frame 214. The tab 224 forms a plane 226 that is generally parallel to an outward primary surface 228 of the backsheet 210. The glass article 10, the one or more photovoltaic cells 202, and the backsheet 210 are all coupled to each other as a package 230. The sidewall 220 extends around a perimeter 232 of the package 230 with the perimeter 232 of the package 230 secured within the C-channel 222 of the frame 214.

[0126] The glass article 10 of the present disclosure addresses the problems set forth in the Background, among other problems, in a variety of ways. First, the glass article 10 prevents a significant percentage of ultraviolet electromagnetic radiation from transmitting through the glass article 10. Thus, when utilized as a cover glass over one or more photovoltaic cells 202, the glass article 10 slows solarization and other degradation of theAttorney Docket No. SP24-107PCT encapsulant 212 and the one or more or more photovoltaic cells 202. Second, the glass article 10 exhibits decreased density compared to previous efforts. Thus, the glass article 10 has reduced weight and a photovoltaic module 200 incorporating the glass article 10 has reduced weight as well, making transporting the photovoltaic module 200 to orbit easier and less costly. Third, the compositions of the glass article 10 can have a liquidus viscosity that is sufficiently high to permit fusions formation of the glass article 10 therefrom. Being able to fusion form the glass article 10 allows for a potentially stronger glass article 10 with more pristine surfaces than the if the glass article 10 were formed via another process such as roller formation.Examples

[0127] Comparative Examples 1-20 - Comparative Examples 1-20 are glass compositions recited in International Patent Application Publication W02023022074A1. The mass percentages recited in the publication are converted to mole percentages and reported in Table 1 below. The publication reports densities and liquidus viscosities for each composition. The liquidus viscosities have been converted from log q to kP below.Attorney Docket No. SP24-107PCTAttorney Docket No. SP24-107PCT

[0128] The density values reported for Comparative Examples 1-20 range from 2.45 g / cm3to 2.57 g / cm3.

[0129] The liquidus viscosity values reported for Comparative Examples 1-20 range from 8 kP to 1000 kP. However, the compositions of Comparative Examples 1-3 and 7 providing the higher liquidus viscosity values of 631 kP, 251 kP, 1000 kP, and 501 kP, respectively, all lack CeCE. Similarly, the composition of Comparative Example 11 providing the liquidus viscosity value of 155 kP likewise lacks CeCE. The highest liquidus viscosity value reported for a composition that included CeCE was 275 kP for Comparative Example 14.

[0130] Examples 1-56 - For Examples 1-56, glass articles including the composition of the present disclosure were formed, analyzed to determine the mole percentages of the various constituents, and then tested to determine density and / or liquidus viscosity that each glass article exhibits. The results are set forth in Table 2 below.Attorney Docket No. SP24-107PCTAttorney Docket No. SP24-107PCTAttorney Docket No. SP24-107PCTAttorney Docket No. SP24-107PCT

[0131] Review of Table 2 reveals that the densities of many of Examples 1-56 are less than the minimum of 2.45 g / cm3from Comparative Examples 1-20. For instance, Example 1 (2.434 g / cm3), Example 4 (2.441 g / cm3), Example 20 (2.437 g / cm3), Example 22 (2.440 g / cm3), Example 28 (2.442 g / cm3), Example 29 (2.416 g / cm3), Example 30 (2.423 g / cm3), Example 31 (2.421 g / cm3), Example 32 (2.426 g / cm3), Example 33 (2.433 g / cm3), Example 37 (2.442 g / cm3), Example 38 (2.429 g / cm3), Example 39 (2.437 g / cm3), Example 40 (2.443 g / cm3), Example 54 (2.442 g / cm3), Example 55 (2.416 g / cm3), and Example 56 (2.423 g / cm3) all have a density that is less than 2.45 g / cm3. For space-based applications, such as photovoltaic modules on satellites, even seemingly small reductions in density are desired. The glass article used as a cover glass over photovoltaic cells is one of the heaviest components of such satellites. In addition, achieving a density of less than 2.45 g / cm3can be difficult when the composition includes more than a trivial mole percentage of CeCE, which has a molar mass of 172.114 g / mol. The Comparative Examples illustrate this with density generally increasing with increasing mole percentage of CeCh. However, Example 1 included 0.5 mol% CeO2 yet exhibited a density of 2.434 g / cm3. Example 20 (0.49 mol% CeCE, 2.437 g / cm3), Example 22 (0.5 mol% CeCE, 2.440 g / cm3), Example 28 (0.25 mol% CeCE, 2.416 g / cm3), Example 29 (0.25 mol% CeCE, 2.416 g / cm3), Example 30 (0.25 CeCE, 2.423 g / cm3), Example 54 (0.24 mol% CeCE, 2.442 g / cm3), Example 55 (0.24 mol% CeCE,Attorney Docket No. SP24-107PCT 2.416 g / cm3), and Example 56 (0.24 mol% CeO2, 2.423 g / cm3) are additional compositions that include a significant mole percentage of CeO2yet exhibited a density of less than 2.45 g / cm3.

[0132] Aside from density, comparison of Table 1 with Table 2 reveals information about liquidus viscosities for compositions that include CeO2. Of the Comparative Examples, Comparative Example 14 included 0.18 mole percent CeO2and exhibited a liquidus viscosity of 275 kP. In contrast, Example 10 (0.51 mol% CeO2, 348 kP), Example 13 (0.49 mol% CeO2, 615 kP), Example 16 (0.50 mol% CeO2, 579 kP), Example 19 (0.49 mol% CeO2, 327 kP), Example 20 (0.49 mol% CeO2, 589 kP), Example 21 (0.49 mol% CeO2, 473 kP), Example 22 (0.50 mol% CeO2, 381 kP), Example 23 (0.49 mol% CeO2, 420 kP), Example 24 (0.49 mol% CeO2, 290 kP), Example 28 (0.25 mol% CeO2, 384 kP), Example 29 (0.25 mol% CeO2, 1103 kP), Example 30 (0.25 mol% CeO2, 571 kP), Example 34 (0.49 mol% CeO2, 395 kP), Example 35 (0.49 mol% CeO2, 348 kP), Example 36 (0.50 mol% CeO2, 326 kP), Example 37 (0.25 mol% CeO2, 504 kP), Example 44 (0.50 mol% CeO2, 282 kP), Example 45 (0.30 mol% CeO2, 429 kP), Example 46 (0.50 mol% CeO2, 598 kP), Example 47 (0.20 mol% CeO2, 385 kP), Example 48 (0.40 mol% CeO2, 280 kP), Example 49 (0.10 mol% CeO2, 311 kP), Example 50 (0.20 mol% CeO2, 478 kP), Example 54 (0.24 mol% CeO2, 384 kP), Example 55 (0.24 mol% CeO2, 1103 kP), and Example 56 (0.24 mol% CeO2, 571 kP) all exhibited a greater liquidus viscosity while including CeO2.

[0133] Further, the Examples exhibit significant reduction in transmission of ultraviolet electromagnetic radiation. That property is exhibited by the 50% cutoff wavelength generally within a range of from 295 nm to 345 nm. For the glass articles of Examples 13-15, 25, and 29, each having a thickness of 50 pm, the transmission percentage therethrough as a function of wavelength was determined. The results are reproduced in graphical form at FIG. 8. All of those compositions include 2.0 mole percent TiO2and different mole percentages of CeO2. The results reveal that incorporating both cerium and titanium together can fully or partially block transmission of electromagnetic radiation throughout a range of ultraviolet wavelengths. Titanium primarily absorbs at within the wavelength range of from 290 nm to 300 nm, while cerium exists in silicate glasses in two different valence states, Ce4+and Ce3+, inducing absorption in the ultraviolet wavelength region with respectively a wide peak of absorption centered at about 240 nm and a narrow asymmetrical peak of absorption through the range of from 300 nm to 320 nm. At small substrate thicknesses (e.g., 50 pm), the combination of both titanium and cerium can beAttorney Docket No. SP24-107PCT beneficial to minimize transmission of electromagnetic radiation within the ultraviolet wavelength range of from about 260 nm to 320 nm.

[0134] It will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit or scope of the claims.

Claims

Attorney Docket No. SP24-107PCTCLAIM(S)What is claimed is:

1. A glass article comprising: a composition comprising (in mole percentage and on an oxide basis): from 65.0 to 79.0 SiCh; from 4.00 to 13.00 AI2O3; from 4.50 to 15.80 Na?O; from 0.20 to 3.50 TiCh; and from 0 to 2.00 Ce20s, wherein, the composition is substantially free of B2O3.

2. The glass article of claim 1, wherein the composition comprises: from 2.00 to 3.50 MgO; from 1.00 to 4.00 CaO; and from >0 to 5.00 K2O.

3. The glass article of any one of claims 1-2, wherein the composition further comprises from 0 to 1.30 ZnO.

4. The glass article of any one of claims 1-3, wherein the composition comprises from >0 to 0.75 CeCh.

5. The glass article of any one of claims 1-4, wherein the composition comprises: from 0.75 to 1.75 TiCh, and from 0.50 to 1.00 CeCh.

6. The glass article of any one of claims 1-4, wherein the composition comprises: from 1.50 to 3.00 TiCh; and from 0 to 0.50 CeCh.Attorney Docket No. SP24-107PCT7. The glass article of any one of claims 1-6, wherein the composition comprises: from 70.0 to 79.0 SiO2; from 4.50 to 8.50 AI2O3; from 2.00 to 3.50 MgO; from 1.80 to 2.90 CaO; from 0 to 1.50 ZnO; from 4.50 to 12.00 Na2O; and from 0 to 5.50 K2O.

8. The glass article of any one of claims 1-7, wherein the composition is substantially free of K2O.

9. The glass article of any one of claims 1-8, wherein the composition is substantially free of Li2O.

10. The glass article of any one of claims 1-9, wherein the glass article exhibits a density that is less than or equal to 2.444 g / cm3.

11. The glass article of claim 10, wherein the density that the glass article exhibits is less than or equal to 2.430 g / cm3.

12. The glass article of any one of claims 1-11, wherein the composition exhibits a liquidus viscosity that is greater than or equal to 200 kP.

13. The glass article of claim 12, wherein the liquidus viscosity that the composition exhibits is greater than or equal to 350 kP.

14. A glass article comprising: a composition (in mole percentage and on an oxide basis) comprising: from 55.0 to 67.0 SiO2; from 15.00 to 18.25 A12O3; from >0 to 5.00 P2Os;Attorney Docket No. SP24-107PCT from 2.50 to 5.00 B2O3; from >0 to 1.50 MgO; and from >0 to 0.25 TiCh.

15. The glass article of claim 14, wherein the composition further comprises: from >0 to 2.50 CaO; from >0 to 2.00 SrO; from 6.50 to 8.00 Li2O; and from >0 to 0.50 K2O.

16. The glass article of any one of claims 14-15, wherein the glass article exhibits a density that is less than or equal to 2.440 g / cm3.

17. The glass article of any one of claims 14-16, wherein the composition exhibits a liquidus viscosity that is greater than or equal to 50 kP.

18. A glass article comprising: a composition comprising (in mole percentage and on an oxide basis): from 58.0 to 79.0 SiCh; from 4.50 to 18.20 AI2O3; from 0 to 2.00 P2O5; from 0 to 9.00 B2O3; from >0 to 3.00 MgO; from >0 to 9.00 CaO; from 0 to 1.20 SrO; from 0 to 0.10 ZnO; from 0 to 8.00 Li2O; from 4.50 to 12.00 Na2O; from >0 to 5.00 K2O; from >0 to 2.75 TiCh; and from 0 to 1.00 CeO2, wherein, the composition exhibits a density that is less than or equal to 2.440 g / cm3.Attorney Docket No. SP24-107PCT19. The glass article of claim 18, wherein the composition exhibits a liquidus viscosity that is greater than or equal to 50 kP.

20. A glass article comprising: a composition comprising (in mole percentage and on an oxide basis): from 64.0 to 79.0 SiCh; from 4.80 to 10.80 AI2O3; from 2.00 to 5.70 MgO; from 4.80 to 16.00 Na?O; from 0 to 5.00 K2O; from 0.50 to 3.50 TiCh; and from >0 to 0.70 CeCh, wherein, the composition exhibits a liquidus viscosity that is greater than or equal to 300 kP.

21. The glass article of claim 20, wherein the composition is substantially free of P2O5, B2O3, Fe2O3, and Li2O.

22. The glass article of any one of claims 20-21, wherein the composition further comprises (in mole percentage and on an oxide basis): from >0 to 1.20 ZnO.

23. The glass article of any one of claims 20-22, wherein the composition further comprises (in mole percentage and on an oxide basis): from 1.70 to 3.20 CaO.

24. A laminate comprising: a first glass layer comprising the glass article of any one of claims 1-23; and a second glass layer laminated to the first glass layer.

25. The laminate of claim 24 further comprising: an interlayer disposed between the first glass layer and the second glass layer; wherein, the first glass layer comprises a thickness that is less than 250 pm.Attorney Docket No. SP24-107PCT26. A photovoltaic module comprising: one or more photovoltaic cells, and the glass article of any one of claims 1-23 or the laminate of any one of claims 24-25 disposed between the one or more photovoltaic cells and an external environment.

27. The photovoltaic module of claim 26 further comprising: an encapsulant at least partially encapsulating the one or more photovoltaic cells.

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