BISMUTH-CONTAINING LEAD-FREE GLASS COMPOSITION

摘要

A lead-free glass composition which has a softening point of 600°C or lower and is suitable for use in forming a glass for the dielectric layers of PDPs which has excellent light-transmitting properties. It is a bismuth-containing lead-free glass composition characterized by containing, in terms of oxide amount in mass%, 25-45% Bi<SUB>2</SUB>O<SUB>3</SUB> and 5-20% BaO, the mass ratio of the BaO to the Bi<SUB>2</SUB>O<SUB>3</SUB>, BaO/Bi<SUB>2</SUB>O<SUB>3</SUB>, being 0.2-0.7. It is further characterized by containing 1-10% SiO<SUB>2</SUB>, 10-35% B<SUB>2</SUB>O<SUB>3</SUB>, 21-35% ZnO, 0-5% Al<SUB>2</SUB>O<SUB>3</SUB>, and 0-20% the sum of MgO, CaO, and SrO.