Sodium halide discharge lamp with an alumina silicate barrier zone in fused silica envelope

A graded alumina silicate glass layer or zone is formed at the surface of fused silica by first applying a polycrystalline coating of aluminum oxide to the silica and then fusing the coating into the silica at a high temperature. Such a zone on the outside of the fused silica arc tube of a metal hal...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	CLAUSEN, EDWARD M
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
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A graded alumina silicate glass layer or zone is formed at the surface of fused silica by first applying a polycrystalline coating of aluminum oxide to the silica and then fusing the coating into the silica at a high temperature. Such a zone on the outside of the fused silica arc tube of a metal halide lamp containing sodium is particularly effective to inhibit sodium loss by diffusion through the tube walls.