Tri-layer impregnated cathode

Details Tri-layer impregnated cathode Tri-layer impregnated cathode

1988-04-28

1995-05-23

Walsh, Donald P.

Stock material or miscellaneous articles

Camouflaged article

428545, 428548, 428550, 428551, 428567, 428568, 419 2, 419 10, 419 23, 419 27, 313364, B22F 702, H01J 2900

Patent

active

054180708

ABSTRACT:
An impregnated cathode comprising three layers: a very thin emitting surface layer of metal such as an alloy of tungsten with a high fraction of an activating metal of the platinum group to provide low workfunction; an underlying, thin buffer layer of porous tungsten alloyed with a fraction of activating metal, to retard diffusion loss of activating metal from the emitting layer; and a substrate of porous tungsten impregnated with barium aluminate.

REFERENCES:
patent: 2700000 (1955-01-01), Levi et al.
patent: 3373307 (1968-03-01), Zalm et al.
patent: 4165473 (1979-08-01), Falce
patent: 4400648 (1983-08-01), Taguchi et al.
patent: 4417173 (1983-11-01), Tuck et al.
patent: 4459323 (1984-07-01), Graulean et al.
patent: 4518890 (1985-05-01), Taguchi et al.
patent: 4570099 (1986-02-01), Green
patent: 4594220 (1986-06-01), Hasker et al.
patent: 4625142 (1986-11-01), Esdouk et al.
patent: 4675570 (1987-06-01), Green
patent: 4833361 (1989-05-01), Suzuki et al.
patent: 4873052 (1989-10-01), Hasker et al.
patent: 4893052 (1990-01-01), Tanabe et al.
patent: 4994709 (1991-02-01), Green et al.
patent: 5006753 (1991-04-01), Hasker et al.
patent: 5266414 (1993-11-01), Goeser et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2139437