HIGH-TEMPERATURE RESISTANT ALUMINOSILICATE GLASS FOR LAMP BULB AND ITS USE

PROBLEM TO BE SOLVED: To provide an alkaline earth metal-containing aluminosilicate for lamp bulbs that shows the resistance to blackening, when it is used as a molybdenum part and a bulb glass having bulb temperature higher than 650 deg.C and shows sufficient thermal stability to the bulb temperatu...

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Bibliographische Detailangaben
Hauptverfasser:	BECKER OTMAR DR, NAUMANN KARIN DR, OTT FRANZ DR
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRIC INCANDESCENT 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 alkaline earth metal-containing aluminosilicate for lamp bulbs that shows the resistance to blackening, when it is used as a molybdenum part and a bulb glass having bulb temperature higher than 650 deg.C and shows sufficient thermal stability to the bulb temperature and reboiling resistance. SOLUTION: This aluminosilicate glass has the following formulation represented in % by weight based on oxides of individual components: SiO2 >58-62%, Al2 O3 =15-17.5%, B2 O3 =0.27-0.7%, CaO=5.5-14%, SrO=0-8%, BaO=6-10%, MgO=0-