| 摘要 |
The invention relates to a glass composition for the production of substrates or thermically stable plates, comprising the following constituents: 67 75 wt. % SiO2, 0.5 1wt % Al2O3, 2 7 wt. % ZrO2, 9 wt. % Na2O 2, 11 wt. % K2O 4, 0 5 wt. % MgO, 5 10 wt. % CaO, 5 -12 wt. % SrO, 0 3 wt. % BaO, 0 3 wt. % B2O3, 0 2 wt. % Li2O whereby Na2O + K2O > 10 % MgO + CaO + SrO + BaO > 12 % and the coefficient of linear thermal expansion of said composition is 80 - 90 x 10<-7>/ DEG C. The invention also relates to the use of said glass compositions for the production of substrates, particularly emissive screens, and fire-resistant glazing. |
