Method of manufacturing quartz glass for a lamp vessel

Details Method of manufacturing quartz glass for a lamp vessel Method of manufacturing quartz glass for a lamp vessel

1996-10-18

1998-12-22

Griffin, Steven P.

Glass manufacturing

Processes

Operating under inert or reducing conditions

651343, 651349, 501 54, 501134, C03B 500, C03C 306

Patent

active

058512535

ABSTRACT:
The electric incandescent lamp has a quartz glass lamp vessel (1) or envelope (4') around the lamp vessel, which has a red coloured dope in the area at the side of the incandescent body (3). The quartz glass with red dope contains samarium.sup.II oxide, aluminium oxide, titanium dioxide, and silicon dioxide, the analysis of the glass in its oxidized form being Sm.sub.2 O.sub.3 1 to 3% by weight, Al.sub.2 O.sub.3 up to 3% by weight, TiO.sub.2, rest SiO.sub.2, the molar ratio Al/Sm being at least about 2 and the molar ratio Sm/Ti being from 2 to 8.

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