Lead-free bismuth-containing silicate glasses and uses thereof

Lead-free bismuth-containing silicate glasses and uses thereof

1. Field of the Invention The lead-free bismuth-containing silicate glasses, which are particularly suitable for use as funnel glass or neck glass for cathode ray tubes and as soldering glass, have the following respective compositions (in % by weight, based on oxide): SiO40-60; BiO, 10-30; ZrO, 0-3...

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Hauptverfasser: Naumann, Karin, Winkler-Trudewig, Magdalena, Woelfel, Ute, Kunert, Christian
Format: Patent
Sprache:eng
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Zusammenfassung:1. Field of the Invention The lead-free bismuth-containing silicate glasses, which are particularly suitable for use as funnel glass or neck glass for cathode ray tubes and as soldering glass, have the following respective compositions (in % by weight, based on oxide): SiO40-60; BiO, 10-30; ZrO, 0-3; AlO, 0.5-5; MgO, 0-6; CaO, 0.5-5; SrO, 1-15; BaO, 0-15; sum of the alkaline earth metal oxides, 2-20; ZnO, 0-2; LiO, 0-10; NaO, 1-10; KO, 2-10; CsO, 0-3, sum of the alkali metal oxides, 5-20; CeO, 0-8; WO, 0.5-5; MoO, 0-5 and SbO, 0-0.6; and SiO30-50; BiO, 20-40; ZrO, 0-3; AlO, 0.5-5; MgO, 0-4; CaO, 0.5-4; SrO, 1-15; BaO, 0-15; sum of the alkaline earth metal oxides, 2-20; ZnO, 0-2; LiO, 0-5; NaO, 1-12; KO, 2-15; CsO, 0-3, sum of the alkali metal oxides, 5-20; CeO, 0-8; WO, 0.5-5; MoO, 0-5 and SbO, 0-0.6.