Abstract: Glasses containing silicon dioxide (SiO2) and/or boron oxide (B2O3) as glass formers and having a refractive index nd of greater than or equal to 1.80, as measured at 587.56 nm, a density of less than or equal to 5.5 g/cm3, as measured at 25° C., and a high transmittance to, particularly to blue light, are provided. Optionally, the glasses may be characterized by a high transmittance in the visible and near-ultraviolet (near-UV) range of the electromagnetic spectrum and/or good glass forming ability.

Abstract: The embodiments described herein relate to glass articles that include mechanically durable glass compositions having high liquidus viscosity. The glass articles may include glass compositions having from 50 mol. % to 80 mol. % SiO2; from 7 mol. % to 25 mol. % Al2O3; from 2 mol. % to about 14 mol. % Li2O; 0.4 mol. % P2O5; and less than or equal to 0.5 mol. % ZrO2. The quantity (Al2O3 (mol. %)-R2O (mol. %)-RO (mol. %)) is greater than zero, where R2O (mol. %) is the sum of the molar amounts of Li2O, Na2O, K2O, Rb2O, and Cs2O in the glass composition and RO (mol. %) is the sum of the molar amounts of BeO, MgO, CaO, SrO, BaO, and ZnO in the glass composition. A molar ratio of (Li2O (mol. %))/(R2O (mol. %)) may be greater or equal to 0.5. In embodiments, the glass composition may include B2O3. The glass compositions are fusion formable and have high damage resistance.

Abstract: A glass composition having a content of SiO2 that is greater than or equal to about 44.0 mol. % and less than or equal to about 60.0 mol. % and a content of ZnO that is less than or equal to about 1.0 mol. %. Additionally, the glass composition is essentially free of Pb and Bi. The glass composition also has a refractive index that is greater than or equal to 1.75 and a density that is less than or equal to about 4.5 g/cm3.

Abstract: The embodiments described herein relate to glass articles that include mechanically durable glass compositions having high liquidus viscosity. The glass articles may include glass compositions having from 50 mol. % to 80 mol. % SiO2; from 7 mol. % to 25 mol. % Al2O3; from 2 mol. % to about 14 mol. % Li2O; 0.4 mol. % P2O5; and less than or equal to 0.5 mol. % ZrO2. The quantity (Al2O3 (mol. %)-R2O (mol. %)-RO (mol. %)) is greater than zero, where R2O (mol. %) is the sum of the molar amounts of Li2O, Na2O, K2O, Rb2O, and Cs2O in the glass composition and RO (mol. %) is the sum of the molar amounts of BeO, MgO, CaO, SrO, BaO, and ZnO in the glass composition. A molar ratio of (Li2O (mol. %))/(R2O (mol. %)) may be greater or equal to 0.5. In embodiments, the glass composition may include B2O3. The glass compositions are fusion formable and have high damage resistance.

Abstract: Glasses containing silicon dioxide (SiO2) and/or boron oxide (B2O3) as glass formers and having a refractive index nd of greater than or equal to 1.9, as measured at 587.56 nm, and a density of less than or equal to 5.5 g/cm3, as measured at 25° C., are provided. Optionally, the glasses may be characterized by a high transmittance in the visible and near-ultraviolet (near-UV) range of the electromagnetic spectrum and/or good glass forming ability.

Abstract: Glass compositions include titania (TiO2), lanthanum oxide (La2O3) and boron oxide (B2O3) as essential components and may optionally include silica (SiO2), niobia (Nb2O5), zirconia (ZrO2), yttria (Y2O3), bismuth oxide (Bi2O3), tungsten oxide (WO3), zinc oxide (ZnO) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

Abstract: Glass compositions include bismuth oxide (Bi2O3) in an amount of greater than or equal to 0.05 mol.% and less than or equal to 10 mol.%, one or more of boron oxide (B2O3), silica (SiO2) and phosphorus oxide (P2O5), and one or more of niobia (Nb2O5) and titania (TiO2) as essential components, and may optionally include lanthanum oxide (La2O3), tungsten oxide (WO3), zirconia (ZrO2), yttria (Y2O3), barium oxide (BaO) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

Abstract: A glass composition having a content of SiO2 that is greater than or equal to about 44.0 mol. % and less than or equal to about 60.0 mol. % and a content of ZnO that is less than or equal to about 1.0 mol. %. Additionally, the glass composition is essentially free of Pb and Bi. The glass composition also has a refractive index that is greater than or equal to 1.75 and a density that is less than or equal to about 4.5 g/cm3.

Abstract: Glass compositions include phosphorus oxide (P2O5), niobia (Nb2O5), titania (TiO2) and bismuth oxide (Bi2O3) as essential components and may optionally include barium oxide (BaO), calcium oxide (CaO), potassium oxide (K2O), lithium oxide (Li2O), sodium oxide (Na2O), tungsten oxide (WO3), boron oxide (B2O3) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

Abstract: Glass compositions with high Young's modulus are disclosed. The glass compositions may include phosphorus oxide (P2O5), alumina (Al2O3), boron oxide (B2O3), lithium oxide (Li2O), magnesia (MgO), titania (TiO2), lanthanum oxide (La2O3) and other components.

Abstract: Glass compositions include boron oxide (B2O3), lanthanum oxide (La2O3), tungsten oxide (WO3) and zirconia (ZrO2) as components and may optionally include niobia (Nb2O5), titania (TiO2), bismuth oxide (Bi2O3), yttria (Y2O3), tellurium oxide (TeO2), SiO2, PbO and other components. The glasses may be characterized by high refractive index at 587.56 nm and low density at room temperature relative to known glasses.

Abstract: Glass compositions include niobia (Nb2O5), phosphorus oxide (P2O5) and titania (TiO2) as essential components and may optionally include calcium oxide (CaO), potassium oxide (K2O), barium oxide (BaO), sodium oxide (Na2O), lithium oxide (Li2O), magnesia (MgO), zinc oxide (ZnO) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

Abstract: Glass compositions include phosphorus oxide (P2O5), niobia (Nb2O5), titania (TiO2), potassium oxide (K2O) and calcium oxide (CaO) as essential components and may optionally include barium oxide (BaO), sodium oxide (Na2O), lithium oxide (Li2O), tungsten oxide (WO3), bismuth oxide (Bi2O3), tantalum oxide (Ta2O5), silica (SiO2) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

Abstract: Glass compositions include phosphorus oxide (P2O5), niobia (Nb2O5), barium oxide (BaO) and potassium oxide (K2O) as essential components and may optionally include titania (TiO2), calcium oxide (CaO), sodium oxide (Na2O), lithium oxide (Li2O), bismuth oxide (Bi2O3), strontium oxide (SrO), tungsten oxide (WO3) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

Abstract: Glass compositions include titania (TiO2), lanthanum oxide (La2O3), boron oxide (B2O3), silica (SiO2) as essential components and may optionally include zirconia (ZrO2), niobia (Nb2O5), calcium oxide (CaO), barium oxide (BaO), yttria (Y2O3), zinc oxide (ZnO), gadolinium oxide (Gd2O3), gallia (Ga2O3), tungsten oxide (WO3) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

Abstract: Glass compositions include boron oxide (B2O3), lanthanum oxide (La2O3), titania (TiO2) and niobia (Nb2O5) as essential components and may optionally include silica (SiO2), tungsten oxide (WO3), zirconia (ZrO2), yttria (Y2O3), bismuth oxide (Bi2O3), barium oxide (BaO), TeO2 and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low liquidus temperature.

Abstract: A glass composition comprising: Al2O3, ZnO, and SiO2; TiO2, in the amount of at least 10 mol % and not greater than 20 mol %; and alkaline metal oxide selected from the group consisting of MgO, CaO, SrO, BaO, or any combination thereof, such that the molar sum of MgO, CaO, SrO, BaO, and ZnO, in the amount in the glass composition is least 20 mol % and not greater than 35 mol %, and such that: the amount of BaO is 0 to 10 mol %; the amount of MgO is 0 to 10 mol % the amount of CaO is 0 to 10 mol %, and the molar sum of CaO and MgO in the glass composition is less than 12.5 mol %; and rare earth metal oxides (?REmOn), in the amount of at least 1.5 mol % and not greater than 10 mol %; alkali metal oxides (?Alk2O), in the amount of greater than or equal to 0 mol % and less than or equal to 5 mol %; and not greater than 5 mol % of other components; and wherein ?5 mol %?Al2O3 (mol %)?1.5 ?REmOn (mol %)??Alk2O (mol %)?+5 mol %.

Abstract: Glass compositions include phosphorus oxide (P2O5), niobia (Nb2O5), barium oxide (BaO) and potassium oxide (K2O) as essential components and may optionally include titania (TiO2), calcium oxide (CaO), sodium oxide (Na2O), lithium oxide (Li2O), bismuth oxide (Bi2O3), strontium oxide (SrO), tungsten oxide (WO3) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

Abstract: Glass compositions include phosphorus oxide (P2O5), niobia (Nb2O5), titania (TiO2), potassium oxide (K2O) and calcium oxide (CaO) as essential components and may optionally include barium oxide (BaO), sodium oxide (Na2O), lithium oxide (Li2O), tungsten oxide (WO3), bismuth oxide (Bi2O3), tantalum oxide (Ta2O5), silica (SiO2) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

Abstract: Glass compositions include niobia (Nb2O5), phosphorus oxide (P2O5) and titania (TiO2) as essential components and may optionally include calcium oxide (CaO), potassium oxide (K2O), barium oxide (BaO), sodium oxide (Na2O), lithium oxide (Li2O), magnesia (MgO), zinc oxide (ZnO) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.