Bismuth glass composition, and magnetic head and plasma display panel including the same as sealing member

摘要

A Bismuth glass composition including 0.5 to 14 wt % of SiO₂, 3 to 15 wt % of B₂O₃, 4 to 22 wt % of ZnO, 55 to 90 wt % of Bi₂O₃ and 4 wt % or less of Al₂O₃, and further including 5 wt % or less of an oxide of Group A, 12 wt % or less of an oxide of Group B and 0.1 to 10 wt % of an oxide of Group C, wherein the oxide of Group A is at least one selected from the group consisting of Li₂O, Na₂O and K₂O, the oxide of Group B is at least one selected from the group consisting of MgO, CaO, SrO and BaO, and the oxide of Group C is at least one selected from the group consisting of Sc₂O₃, Y₂O₃, La₂O₃, CeO₂, Pr₂O₃, Nd₂O₃, Sm₂O₃, Eu₂O₃, Gd₂O₃, Tb₂O₃, Dy₂O₃, Ho₂O₃, Er₂O₃, Tm₂O₃, Yb₂O₃ and Lu₂O₃.