BLEIOXIDFREIES GLAS FUER ELEKTRISCHE GERAETE

摘要

The lead oxide-free glass has the following composition: …                   SiO2  40 - 60%                   Al2O3  2 - 5%                   CaO    5 - 10%                   BaO   20 - 30%                   V2O5   2 - 5%                   K2O    5 - 7% … …It is distinguished, in particular, by a high electrical resistance of 10<12> OMEGA cm at 250 DEG C. ……