Infrared absorbent green glass composition and laminated glass including the same

Abstract

A glass composition that has improved infrared absorptivity while preventing the visible light transmittance from decreasing excessively. The glass composition includes: the following components, expressed in mass %: 65<SiO2≦75; 0≦B2O3≦5; 0≦Al2O3≦5; 0≦MgO<2; 10<CaO≦15; 0≦SrO≦10; 0≦BaO≦10; 0≦Li2O≦5; 10≦Na2O≦15; 0≦K20≦5; and 0≦TiO2≦0.5, where 10<MgO+CaO+SrO+BaO≦20 and 10≦Na2O+K2O≦17.5; MnO 0 to 300 mass ppm; and the following components as colorants, expressed in mass %: 0.4≦T—Fe2O3≦1.0, where T—Fe2O3 is total iron oxide expressed as Fe2O3; and 0≦CeO2≦2.0. The mass ratio of FeO expressed as Fe2O3 to T—Fe2O3 is 20 to 44%. The wavelength at which a minimum transmittance is obtained in a range of 550 to 1700 nm is at least 1065 nm. The transmittance that is obtained at a wavelength of 1650 nm is not higher than the transmittance that is obtained at a wavelength of 730 nm.

Dependencies are inferred from the claim text.