| 简介 |
It is a glass having high [...] described, the has a transmittance in the wavelength range of 283 to 329 nm, the τ = 1.7 · lies within the by the equations contains (λ-277) τ = 1.6 · (λ-284) formed corridor and, wherein the wavelength is in percent and the transmittance τ λ (in wt.-percent on an oxide basis) and wherein the glass : 55-82 SiO2, 10-20 B2O3, 1 - 10 Al2O3, 0 - 5 Li2O, 0-10 Na2O, 0-10 K2O, 0-10 Σ alkali metal oxides, MgO 0-5, 0-10 CaO, SrO 0-5, 0-15 BaO, 0-5 Σ alkaline earth oxides, ZrO2 0-3, 0-5 ZnO, 0-2 CeO2, 0 - 3 WO3, SnO2 0-2, 0-0, 1 Fe2O3 as impurities, MoO3 0.05-2, 0-5 Bi2O3, 0 - 5 0-1 TiO2 and oxides of Rh, Hf, Ta, Re, Os, Ir, Pt, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, He, Tm, Yb, Lu. The transmittance is adjusted by MoO3, optionally in combination with TiO2 and Bi2O3 and on a sheet having a thickness of 1.3 mm demonstrated. The glass is particularly suitable for use in weathering plants. |
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