IRRADIATION RESISTANT GLASS Russian patent published in 1997 - IPC

FIELD: production of optic elements. SUBSTANCE: proposed glass comprises, mas. %: silicium oxide having essential formula SiO2, 14-51; germanium oxide having essential formula GeO2, 7-60; zirconium oxide having essential formula ZrO2, 3-21; cerium oxide having essential formula GeO2, 0.5-6.5; sodium oxide having essential formula Na2O, 4-14; potassium oxide having essential formula K2O, 0.01-10; and lithium oxide having essential formula Li2O, 0.01-10; total amount of alkali oxides is 14-20 mas.%. Proposed glass also may comprise up to 20 mas.% of lanthanum oxide having essential formula La2O3 and at least up to 3% of chlorides (which are chosen of potassium chloride KCl and sodium chloride NaCl). EFFECT: improved quality. 3 cl, 1 tbl