Antimicrobial phosphate glass with adapted refractive index

摘要

The invention relates to an antimicrobial phosphate glass composition that comprises the following components in wt % based on oxide: P₂O₅>45-90 wt % B₂O₃ 0-60 wt % SiO₂ 0-40 wt % Al₂O₃ 0-20 wt % SO₃ 0-30 wt % Li₂O 0-0.1 wt % Na₂O 0-0.1 wt % K₂O 0-0.1 wt % CaO 0-40 wt % MgO 0-40 wt % SrO 0-15 wt % BaO 0-40 wt % ZnO 0-40 wt % Ag₂O 0-5 wt % CuO 0-15 wt % Cr₂O₃ 0-10 wt % I 0-10 wt % TeO₂ 0-10 wt % GeO₂ 0-10 wt % TiO₂ 0-10 wt % ZrO₂ 0-10 wt % La₂O₃ 0-10 wt % Nb₂O₃ 0-5 wt % CeO₂ 0-5 wt % Fe₂O₃ 0-5 wt % WO₃ 0-5 wt % Bi₂O₃ 0-5 wt % MoO₃ 0-5 wt % wherein the sum formed from TiO₂ and ZrO₂ and BaO and La₂O₃ and Cr₂O₃ and Nb₂O₃ lies in the range of 0.01-40 wt % and the sum formed from Ag₂O and ZnO and CuO and Cr₂O₃ and I and TeO₂ and GeO₂ lies in the range of 0.1-40 wt % and the composition is, apart from contaminants, free of Sn.