Cathode for an electron tube

Details Cathode for an electron tube Cathode for an electron tube

1988-06-10

1990-12-25

DeMeo, Palmer C.

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

H01J 114

Patent

active

049806033

ABSTRACT:
A cathode for an electron tube comprises a base (1) including nickel as a major element and including at least silicon as a reducing element, and it further comprises an electron-emissive layer (5) coated on the base, including not only alkaline earth metal oxide (8) containing at least barium but also scandium oxide. The scandium oxide (4) is in the form of dodecahedral or prismatic polyhedral crystals and dispersed in the electron-emissive layer in the range from 0.1 to 20 wt. %.

REFERENCES:
patent: 4007393 (1977-02-01), van Stratum et al.
patent: 4625142 (1986-11-01), Esdonk et al.
patent: 4797593 (1989-01-01), Saito et al.
patent: 4864187 (1989-09-01), Kinjiro et al.
patent: 4873052 (1989-10-01), Hasker et al.
"Electron Emission Properties and Surface Atom Behavior of Impregnated Cathodes With Rare Earth Oxide Mixed Matrix Base Metals" of Yamamoto et al., pp. 69-83, (Jul. 1984).

Affiliated with

Also associated with

Rating

Cathode for an electron tube does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cathode for an electron tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cathode for an electron tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1165058