Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1997-08-19
1998-04-28
O'Shea, Sandra L.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313575, 313633, 313346R, H01J 162, H01J 6304, H01J 1720, H01J 6112
Patent
active
057449058
ABSTRACT:
The present invention is directed to new electrode structures for use in fluorescent lamps in which a tungsten base structure is provided with electron emissive materials including one or more of barium titanate, barium zirconate, barium strontium zirconate, barium cerium oxide, barium tantalate, and barium strontium yittrium oxide. Amounts of MgO may be added to improve or change emitter properties. A composite electrode structure can be formed by way of coating a tungsten coil with a slurry of this material, or providing powdered mixtures of both the electron emissive material and tungsten material and sintering this powdered material into a high density composite electrode structure.
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New Riverside University Dictionary Copyright 1984 by Houghton Mifflin Company.
"Uber die Beeinflussung des Sinterverhaltens von Wolfram", by Von J. Vacek, Planseeberichte fur Pulvermetallurgie, pp. 6-17.
Betrabet Hemant S.
Leyh Thomas O.
McGee Susan
Mehrotra Vivek
Woodward David Robert
Haynes Mack
O'Shea Sandra L.
Philips Electronics North America Corporation
Schaier Arthur G.
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