| 摘要 |
The electric lamp has a glass component with a composition which, according to the invention, is substantially free of PbO and has the following constituents: 55-70 wt.% SiO2, <0.1 weight% Al2O3, 0.5-4 weight% Li2O, 0.5-3 weight% Na2O, 10-15 wt.% K2O, 0-3 wt.% MgO, 0-4 wt.% CaO, 0.5-5 wt.% SrO, 7-10 wt.% BaO. Preferably, the composition of the glass comprises: 65-70 wt.% SiO2, 1.4-2.2 wt.% Li2O, 1.5-2.5 wt.% Na2O, 11-12.3 wt.% K2O, 1.8-2.6 wt.% MgO, 2.5-5 wt.% CaO, 2-3.5 wt.% SrO, 8-9.5 wt.% BaO. The glass is preferably used as a CFL-envelope glass or as glass for a stem. The electric lamp made with a glass according to the invention has favorable fusion and processing properties, in particular a liquidus temperature Tliq <= 800~C.
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