TUNGSTATE, MOLYBDATE, VANADATE BASE GLASSES

摘要

Alkali tungstate, molybdate and vanadate glasses, and telecommunications components embodying such glasses, the compositions of the glasses consistin g essentially of 15-70 mol percent of at least one oxide selected from the gro up consisting of WO3, MoO3 and VO2.5, 0-35 % CrO3, 0-15 % UO3, the total WO3 pl us MoO3 plus VO2.5 plus CrO3 plus UO3 being 50-70 %, 20-50 % R2O where R represents at least two elements selected from the group consisting of Li, N a, K, Rb, Cs, Ag and Tl, and optionally containing 0-10 % MO where M is selecte d from the groups of elements consisting of Ca, Ba, Sr, Mg, Cd, Pb, 0-5 % X2O3 where x is at least one element selected from the group consisting of Al, Ga , In and Bi, 0-5 % of at least one transition metal oxide, 0-15 % P2O5 and/or TeO2 and 0-5 % of a rare earth oxide selected from the lanthanide series.