Patent ID: 8183170
Filing Date: 2012-05-22
Classification: C03C

Abstract:
1. A UV-absorbing color-filtering glass material comprising precipitated cuprous halide crystals and having a composition, expressed in terms of weight percentage of the total composition, consisting essentially of: 30-65% SiO 2 ; 12-25% B 2 O 3 ; 3-9% Al 2 O 3 ; 2-8% ZrO 2 ; 0-5% Li 2 O; 0-7% Na 2 O; 0-10% K 2 O; 5-20% R 2 O; 0-10% alkaline earth oxides RO (MgO+SrO+CaO+BaO); 0-5% ZnO+La 2 O 3 +Gd 2 O 3 +Y 2 O 3 +Ta 2 O 3 +Nb 2 O 5 +Hf 2 O 5 +WO 3 +MoO 3 ; 0-5% TiO 2 ; 0-2% CeO 2 ; 0-10% Pr 2 O 3 ; 5-15% Nd 2 O 3 ; 0-10% Er 2 O 3 ; 0-2% NiO; 0.25-1.5% CuO; 0-1% Cl; 0-3% Br; 0-2% other halogen; 0.3-3% total of halogens; and 0.3-4% SnO.