Tungsten-thorium dioxide-aluminum oxide mass for a high-temperat

Details Tungsten-thorium dioxide-aluminum oxide mass for a high-temperat Tungsten-thorium dioxide-aluminum oxide mass for a high-temperat

1974-07-23

1976-07-20

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

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

29 2517, 252500, 313311, H01J 114, H01J 1906

Patent

active

039708888

ABSTRACT:
A mass for emission electrodes and the like operating at high temperatures, employing a mixture of thorium dioxide and aluminum oxide, which contains tungsten, the thorium dioxide being present from 33-50% by weight, and the aluminum oxide from 4-15%, to which mixture is added 63-35% of tungsten powder, the powdered tungsten preferably being imbedded in a crystalline melt of thorium dioxide and aluminum dioxide, and a method of producing the same.

REFERENCES:
patent: 3134924 (1964-05-01), Henderson et al.
patent: 3244929 (1966-04-01), Kuhl
patent: 3706001 (1972-12-01), Nall
patent: 3798490 (1974-03-01), Dunham et al.
patent: 3798492 (1974-03-01), Menelly

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