GLASS COMPOSITION

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PURPOSE : A glass composition satisfying environment and safety regulations is provided to enable to soften at low temperatures without the use of lead and bismuth.CONSTITUTION : A glass composition is composed of vanadium and phosphorus as main components and manganese and barium. The glass composition does not contain lead and bismuth. The glass composition additionally contains one material selected among alkali metal, antimony, tellurium, zinc, silicon, aluminum, niobium and rare earth element. The specific resistance of the glass composition is 1O9Ωcm or greater at 25°C. The glass composition consists of 33-45wt%% of V2O5, 22-30wt%% of P2O5, 5-15wt%% of MnO, 10-20wt%% of BaO, 0-8wt%% of R2O and 0-10wt%% of Sb2O3, TeO2, ZnO, SiO2, Al2O3, Nb2O5 and La2O3.© KIPO 2009