Electric lamp and discharge devices – Electrode and shield structures – Cathodes containing and/or coated with electron emissive...
Patent
1986-04-11
1987-06-23
Moore, David K.
Electric lamp and discharge devices
Electrode and shield structures
Cathodes containing and/or coated with electron emissive...
313346DC, 252514, 252515, 445 51, H01J 114, H01J 1906
Patent
active
046755705
ABSTRACT:
Porous agglomerates are made from pure tungsten by sintering fine particles together and mechanically breaking down the mass to form some agglomerates considerably larger than the particles. These agglomerates are mixed with fine iridium powder and sintered to form a porous mass. The mass is machined to the cathode shapes and impregnated with an alkaline earth aluminate. The large agglomerates alloy with the iridium only on their outer surface. Their pure tungsten interior provides the surfaces to reduce the alkaline earth oxide to the metal which activates the cathode.
REFERENCES:
patent: 2700000 (1955-01-01), Levi
patent: 3373307 (1968-03-01), Zalm et al.
patent: 4165473 (1979-08-01), Falce
patent: 4417173 (1983-11-01), Tuck et al.
patent: 4518890 (1985-05-01), Taguchi et al.
Cole Stanley Z.
Fisher Gerald M.
Moore David K.
Varian Associates Inc.
Warsh Kenneth L.
LandOfFree
Tungsten-iridium impregnated cathode does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tungsten-iridium impregnated cathode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tungsten-iridium impregnated cathode will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-723598