Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1975-08-04
1977-03-15
Kominski, John
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313 17, 313113, 428427, H01J 724
Patent
active
040126552
ABSTRACT:
The adherence of an optically reflective coating of refractory metal oxide particles such as ZrO.sub.2 or Al.sub.2 O.sub.3 on a fused silica discharge tube surface is improved severalfold by an adhesion layer consisting of colloidal aluminum oxide and boric oxide powders. The adhesion layer may be first applied and dried, the refractory metal oxide coating then applied, and the quartz tube then heated to a temperature greater than 460.degree. C., the melting point of boric oxide. The refractory metal oxide particles may also be applied admixed with the colloidal aluminum oxide and the boric oxide. The improved coating strength permits the use of a thicker layer of refractory metal oxide for higher optical and thermal reflection.
REFERENCES:
patent: 3226249 (1965-12-01), Van Bakel et al.
patent: 3374377 (1968-03-01), Cook
patent: 3533827 (1970-10-01), Rimbach
patent: 3851200 (1974-11-01), Thomasson
patent: 3879625 (1975-04-01), McVey et al.
patent: 3889142 (1975-06-01), Keeffe
McVey Charles I.
Uy O. Manuel
General Electric Company
Kempton Lawrence R.
Kominski John
Legree Ernest W.
Neuhauser Frank L.
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