| abstract |
A glass composition absorbing ultraviolet rays and infrared rays, comprising the following glass basic ingredients (by weight ratio): SiO 2 : 60-75%; Na 2 O: 8-20%; CaO: 3-12%; Al 2 O 3 : 0.1-5%; MgO: 2-5%; K 2 O: 0.02-7%; BaO: 0.1-5%; and SO 3 : 0.01-0.4%, and comprising the following glass body tinting and coordinating ingredients absorbing ultraviolet rays and infrared rays: Fe 2 O 3 : 0.22-1.35%; ZrO 2 +HfO 2 : 0.001-0.8%; Cl: 0-0.5%; B 2 O 3 : 0-2%; TiO 2 : 0.01-0.8%; CuO: 0.001-0.06%; Br: 0-2.0%; MnO: 0-0.02%; F: 0-2.0%; SrO: 0.001-0.5%; and CeO 2 : 0.005-2.2%, the redox ratio of Fe 2 O 3 in the glass composition being 0.4-0.8; the glass composition effectively blocks ultraviolet rays, infrared rays and total energy, while improving visible light transmittance. |