Method of coating cathode heaters

Details Method of coating cathode heaters Method of coating cathode heaters

1972-02-16

1976-02-24

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

C25D 1302

Patent

active

039403262

ABSTRACT:
A solution containing dissolved tungsten and dissolved aluminum is spray dried to recover a tungsten-and-aluminum containing powder. The powder is then fired to eliminate hydrated water and volatiles and to convert the aluminum compound into alumina. The powder is next fired at a higher temperature in a reducing atmosphere to reduce the tungsten compound to elemental tungsten. A coating suspension containing the tungsten-alumina powder is then prepared and electrophoretically deposited on cathode heaters.

REFERENCES:
patent: 2966449 (1960-12-01), Bouchard et al.

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