| 摘要 |
This invention relates to glasses especially suitable for use as substrates in plasma display panels, the glasses being essentially free from alkali metal oxides and consisting essentially, in weight percent, of -SiO2 39-43 CaO 0-2.5 -Al2O3 2.5-9.5 SrO 10.5-21.5 -B2O3 1.5-4.5 BaO 25.5-39 -MgO 0-1.5 MgO + CaO + SrO +BaO 45.5-52.5 - Fining Agents 0-1.5. -
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