Method for manufacturing an impregnated cathode structure

Details Method for manufacturing an impregnated cathode structure Method for manufacturing an impregnated cathode structure

1992-08-28

1993-08-17

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

445 59, H01J 904

Patent

active

052363821

ABSTRACT:
In a method for manufacturing an impregnated cathode structure, cleaning water under high pressure is sprayed onto a pellet with an impregnated cathode material, thereby eliminating residue adhering on the surface of the pellet. By spraying high-pressure cleaning water, a physical force is applied to only the surface of the pellet, thereby dissolving almost all the residue on the surface of the pellet, as well as portions of an electron emitting material. Thus, the electron emitting material existing adjacent to the surface does not become grown over the surface of the pellet during the partial degeneration thereof, and does not cover or damage a metal covering layer composed of at least any one of Ir, Os, Ru, Re, Sc, etc., and formed on the surface of the pellet.

REFERENCES:
patent: 4833361 (1989-05-01), Suzuki et al.

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