OUTER ENVELOPE FOR EXTERNAL ELECTRODE FLUORESCENT LAMP

PROBLEM TO BE SOLVED: To provide an outer envelope for external electrode fluorescent lamp which has little dielectric loss and hardly has fluctuations in dielectric capacity. SOLUTION: The outer envelope for external electrode fluorescent lamp, used for manufacture of a external electrode fluoresce...

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Bibliographische Detailangaben
1. Verfasser:	HIKATA HAJIME
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:	PROBLEM TO BE SOLVED: To provide an outer envelope for external electrode fluorescent lamp which has little dielectric loss and hardly has fluctuations in dielectric capacity. SOLUTION: The outer envelope for external electrode fluorescent lamp, used for manufacture of a external electrode fluorescent lamp having an electrode formed at the outside, is made of a glass of which the dielectric tangent at 40 KHz, 250°C is 0.02 or less and the strain point is 650°C or less. The above glass is composed of an alumino-borosilicate glass having a composition of SiO235 to 65%, B2O30.1 to 25%, Al2O32 to 20%, Li2O+Na2O+K2O 0.1 to 5% in mass percentage, or SiO235 to 65%, B2O30.1 to 25%, Al2O32 to 12.5%, Li2O+Na2O+K2O 0 to 0.1% or less in mass percentage. COPYRIGHT: (C)2005,JPO&NCIPI