Cathode ray tube neck glass

A cathode ray tube with an improved tubular glass neck member having a softening point in the range of 640-650 DEG C, an annealing temperature in the range of 460-472 DEG C, a strain point in the range of 420-425 DEG C, a coefficient of thermal expansion in the range of 94-97x10-7/DEG C., and a line...

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Bibliographische Detailangaben
1. Verfasser:	TAMMARO, DAVID ALAN
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	A cathode ray tube with an improved tubular glass neck member having a softening point in the range of 640-650 DEG C, an annealing temperature in the range of 460-472 DEG C, a strain point in the range of 420-425 DEG C, a coefficient of thermal expansion in the range of 94-97x10-7/DEG C., and a linear x-ray absorption value of at least 100 cm-1 and a composition, as calculated in weight % on an oxide basis, consisting essentially of 46.5-49.5% SiO2, 1.5-2% Al2O3, 0.5-1.5% Na2O, 10-12% K2O, 2-3% SrO, 1-1.8% BaO, 32-34% PbO, 1-1.5% ZnO and a fining agent.