Cathode member and electron tube having the cathode member mount

Details Cathode member and electron tube having the cathode member mount Cathode member and electron tube having the cathode member mount

1995-05-31

1998-05-26

O'Shea, Sandra L.

Electric lamp and discharge devices

Electrode and shield structures

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

313355, H01J 114, H01J 1906, H01J 102, H01J 138

Patent

active

057571155

ABSTRACT:
With a production of a cathode member for an electron tube having cathode materials containing Ni, a metal having a reduction behavior and an electron emissive agent sintered to be one body and its electron emitting surface subjected to a specular processing, it is possible to obtain an inexpensive cathode characterized by that: the operation temperature is low; the electron emission distribution is excellent because of the smooth electron emitting surface; and the electron emission is enabled with a high current density for a long interval of time.

REFERENCES:
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patent: 3183396 (1965-05-01), Becker et al.
patent: 3924153 (1975-12-01), McIntyre
patent: 4313854 (1982-02-01), Sunahara et al.
patent: 4350920 (1982-09-01), Bertens
patent: 5072149 (1991-12-01), Lee et al.
patent: 5306189 (1994-04-01), Sugimura et al.
patent: 5334085 (1994-08-01), Shroff
patent: 5507675 (1996-04-01), Frost
patent: 5592043 (1997-01-01), Gartner et al.
"Applied Physics", vol. 56, No. 11, pp. 13-22, Aug. 1987.

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