Method for fabricating an impregnated type cathode

Details Method for fabricating an impregnated type cathode Method for fabricating an impregnated type cathode

1991-03-26

1992-03-17

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

445 51, 419 19, 419 49, H01J 904

Patent

active

050964500

ABSTRACT:
A method for fabricating an impregnated type cathode comprises the steps of mixing metal powder having a high melting point and a heat proof property, and electron emission substance powder in a dry state, pressing the mixed powder to provide a pressed mixture, and applying an isostatic pressure to the pressed mixture contained in a sealed capsule. At the mixing stage, the metal powder is heated by a high temperature lower than the melting point, and at the mixing stage, a sintered mixture is obtained. In this method, the steps are simplified and decreased in number to decrease a fabricating cost. Furthermore, no influence occurs in electron emission due to hydrooxides.

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patent: 4823044 (1989-04-01), Falce

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