Glass composition and substrate for plasma display

A substrate for plasma display which is made of a glass composition comprising from 50 to 66 wt % of SiO.sub.2, from 0 to 15 wt % of Al.sub.2 O.sub.3, from 0 to 13.4 wt % K.sub.2 O, from 10 to 24 wt % Li.sub.2 O+Na.sub.2 O+K.sub.2 O, from 0 to 7 wt % of BaO, from 14 to 26 wt % of CaO+MgO+SrO+BaO+ZnO, and from 0 to 1 wt % of SO.sub.3 +Sb.sub.2 O.sub.3, said glass composition containing substantially no zirconia and having a strain point of at least 560.degree. C. and a linear thermal expansion coefficient of at least 80.times.10.sup.-7 /.degree.C. within a temperature range of from 50.degree. to 350.degree. C.

A substrate for plasma display which is made of a glass composition comprising from 50 to 63 wt % of SiO.sub.2, from 5.5 to 15 wt % of Al.sub.2 O.sub.3, from 0 to 6 wt % of Na.sub.2 O, from 1 to 13.4 wt % K.sub.2 O, from 0 to 0.5 wt % Li.sub.2 O, from 10 to 24 wt % Li.sub.2 O+Na.sub.2 O+K.sub.2 O, from 0 to 14 wt % of CaO, from 0 to 6 wt % of MgO, from 1 to 14 wt % of SrO, from 0 to 7 wt % of BaO, from 0 to 6 wt % of ZnO, from 14 to 26 wt % of CaO+MgO+SrO+BaO+ZnO, and from 0 to 1 wt % of SO.sub.3 +Sb.sub.2 O.sub.3 and which contains substantially no zirconia.