Low melting glass, sealing composition and sealing paste

摘要

A low melting glass, which contains substantially no lead and contains 70-90% of Bi₂O₃, 1-20% of ZnO, 2-12% of B₂O₃, 0.1-5% of Al₂O₃, 0.1-5% of CeO₂, 0-5% of CuO, 0-0.2% of Fe₂O₃and 0.05-5% of CuO+Fe₂O₃ in mass %, wherein a content of alkali metal oxides in the glass composition is less than 0.1%, and the glass does not crystallize by pre-baking at a sealing temperature or more, can be used for sealing later, and can suppress deterioration of a material such as platinum or platinum-rhodium to provide a stable melting operation for a long period.