Oxidation resistant impregnated cathode

Details Oxidation resistant impregnated cathode Oxidation resistant impregnated cathode

1988-02-16

1989-08-08

Yusko, Donald J.

Electric lamp and discharge devices

Electrode and shield structures

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

313337, H01J 1914, H01J 114

Patent

active

048556378

ABSTRACT:
An impregnated cathode comprising a cathode obtained by impregnating pore portions of a refractory porous substrate with an electron emissive material containing Ba and formed thereon a plurality of thin films made of a high melting metal and Sc, or a high melting metal and a Sc oxide, or a high melting metal, Sc and a Sc oxide, or a high melting metal and a compound of Sc, W and O, said thin films having the same composition but different densities can maintain good emission characteristics even after the sealing off step of tube production because the thin films formed on the cathode surface are oxidation-resistant.

REFERENCES:
patent: 2912611 (1959-11-01), Beck et al.
patent: 4518890 (1985-05-01), Taguchi et al.
patent: 4626470 (1986-12-01), Yamamoto et al.
patent: 4737679 (1988-04-01), Yamamoto et al.

Affiliated with

Also associated with

Rating

Oxidation resistant 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 Oxidation resistant impregnated cathode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxidation resistant impregnated cathode will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-908047