Patent ID: 6255239
Filing Date: 2001-07-03
Classification: C03C

Abstract:
A lead-free alkali metal-free bismuth-borosilicate glass composition consisting essentially ofComponent Weight Percent Bi.sub.2 O.sub.3 50-90 SiO.sub.2 5-20 B.sub.2 O.sub.3 2-9 Al.sub.2 O.sub.3 0.1-10 TiO.sub.2 0-8 ZnO 0-9 ZrO.sub.2 0-10 F.sup.-1 0.2-4.0 SrO less than 4 CaO up to 7 MgO up to 7 CeO up to 10 MnO up to 10 SnO up to 10 P.sub.2 O.sub.5 up to 7 Sb.sub.2 O.sub.3 up to 10 Fe.sub.2 O.sub.3 up to 10 Nb.sub.2 O.sub.5 up to 10.