The invention provides an environment-friendly optical glass with excellent negative anomalous dispersion performance and an optical element. The optical glass with excellent negative anomalous dispersion performance contains 0-5% of Nb.sub.2O.sub.5, exclusive of TiO.sub.2 and F, wherein the relative partial dispersion Pg, F of the optical glass is less than 0.57, and the negative anomalous dispersion ΔPg, F is less than and equal to −0.008. There is no need to add any non-environmentally friendly element into the optical glass provided by the present invention, with the refractive index of 1.60-1.65, the Abbe number of 40-46, and the negative anomalous dispersion ΔPg, F of generally less than −0.01. Therefore, the optical glass, with excellent negative anomalous dispersion performance and environmental performance, is applicable to be extensively applied to digital camera, digital video, camera phone, etc.

The invention provides an environment-friendly optical glass with excellent negative anomalous dispersion performance and an optical element. The optical glass with excellent negative anomalous dispersion performance contains 0-5% of Nb.sub.2O.sub.5, exclusive of TiO.sub.2 and F, wherein the relative partial dispersion Pg, F of the optical glass is less than 0.57, and the negative anomalous dispersion ΔPg, F is less than and equal to −0.008. There is no need to add any non-environmentally friendly element into the optical glass provided by the present invention, with the refractive index of 1.60-1.65, the Abbe number of 40-46, and the negative anomalous dispersion ΔPg, F of generally less than −0.01. Therefore, the optical glass, with excellent negative anomalous dispersion performance and environmental performance, is applicable to be extensively applied to digital camera, digital video, camera phone, etc.

An optical boroaluminate glass article comprises: from greater than or equal to 10.0 mol % to less than or equal to 30.0 mol % Al.sub.2O.sub.3; from greater than or equal to 10.0 mol % to less than or equal to 55.0 mol % CaO; from greater than or equal to 10.0 mol % to less than or equal to 25.0 mol % B.sub.2O.sub.3; from greater than or equal to 0.0 mol % to less than or equal to 30.0 mol % SiO.sub.2; and from greater than or equal to 1.0 mol % to less than or equal to 20.0 mol % refractive index raising components. The optical boroaluminate glass article has a refractive index of the glass article, measured at 589.3 nm, of greater than or equal to 1.62, and a density of less than or equal to 4.00 g/cm.sup.3.

An optical boroaluminate glass article comprises: from greater than or equal to 10.0 mol % to less than or equal to 30.0 mol % Al.sub.2O.sub.3; from greater than or equal to 10.0 mol % to less than or equal to 55.0 mol % CaO; from greater than or equal to 10.0 mol % to less than or equal to 25.0 mol % B.sub.2O.sub.3; from greater than or equal to 0.0 mol % to less than or equal to 30.0 mol % SiO.sub.2; and from greater than or equal to 1.0 mol % to less than or equal to 20.0 mol % refractive index raising components. The optical boroaluminate glass article has a refractive index of the glass article, measured at 589.3 nm, of greater than or equal to 1.62, and a density of less than or equal to 4.00 g/cm.sup.3.

The invention relates to a light extraction substrate having a light extraction layer. The light extraction layer includes boron, boroate, and/or borosilicate as well as nanoparticles.

An electrical storage system is provided that has a thickness of less than 2 mm, which includes at least one sheet-type discrete element. The sheet-type discrete element exhibits high resistance against an attack of transition metals or transition metal ions, in particular titanium, wherein the sheet-type discrete element contains titanium. The invention also relates to a sheet-type discrete element for use in an electrical storage system, which exhibits high resistance to the attack of transition metals or of transition metal ions, in particular titanium.

An electrical storage system is provided that has a thickness of less than 2 mm, which includes at least one sheet-type discrete element. The sheet-type discrete element exhibits high resistance against an attack of transition metals or transition metal ions, in particular titanium, wherein the sheet-type discrete element contains titanium. The invention also relates to a sheet-type discrete element for use in an electrical storage system, which exhibits high resistance to the attack of transition metals or of transition metal ions, in particular titanium.

Glass frits and enamel compositions from the glass frits for use in automotive application. The enamel composition includes one or more glass frits with reduced amount of bismuth and/or zinc compared to reference enamel compositions available. The glass frits include one or more transition metal oxides. The glass frits exhibit improved chemical durability, reduced glass density, lower L-value, or optimized optical density for an end user depending on the applications.

Glass frits and enamel compositions from the glass frits for use in automotive application. The enamel composition includes one or more glass frits with reduced amount of bismuth and/or zinc compared to reference enamel compositions available. The glass frits include one or more transition metal oxides. The glass frits exhibit improved chemical durability, reduced glass density, lower L-value, or optimized optical density for an end user depending on the applications.

Glass compositions include niobia (Nb.sub.2O.sub.5), phosphorus oxide (P.sub.2O.sub.5) and titania (TiO.sub.2) as essential components and may optionally include calcium oxide (CaO), potassium oxide (K.sub.2O), barium oxide (BaO), sodium oxide (Na.sub.2O), lithium oxide (Li.sub.2O), 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.