| 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. % SiO<SUB>2</SUB>, <0.1 WEIGHT % AL<SUB>2</SUB>O<SUB>3</SUB>, 0.5-4 weight % Li<SUB>2</SUB>O, 0.5-3 weight % Na<SUB>2</SUB>O, 10-15 wt. % K<SUB>2</SUB>O, 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. % SiO<SUB>2</SUB>, 1.4-2.2 wt. % Li<SUB>2</SUB>O, 1.5-2.5 wt. % Na<SUB>2</SUB>O, 11-12.3 wt. % K<SUB>2</SUB>O, 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 T<SUB>liq</SUB><=800° C.
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