Copper(II) oxide-containing aluminophosphate glasses

摘要

The invention relates to a copper(II) oxide-containing aluminophosphate glass having good chemical resistance, very good devitrification stability, high transmission at wavelengths in the range from 350 to 550 nm and a refractive index nd of from 1.52 to 1.54. The glass has the following composition (in % by weight, based on oxide): Al2O3 4-9; P2O5 67-75; BaO 0.5-6; CaO 0.1-1; MgO 0-4; SrO 0-1; ZnO 0.2-1; SIGMA BaO+CaO+MgO+SrO+ZnO 3.5-7; Na2O 1.5-5; K2O 2.5-3.5; Li2O 0.5-5; SIGMA Na2O+K2O+Li2O 5-13; SiO2 0-1; B2O3 1-2.5; AS2O3 0.1-0.5; Cl-0-0.3; F-O-1.3; CeO2 0.2-0.4; CuO 1-6; with KG= SIGMA Al2O3+SiO2+CeO2/ SIGMA P2O5+B2O3 0.06-0.125.