Cathode heater potting assembly

Details Cathode heater potting assembly Cathode heater potting assembly

1991-09-16

1993-05-04

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313346R, H01J 1918

Patent

active

052085082

ABSTRACT:
A potted heater assembly and a method of forming such a potted heater assembly comprises the steps of introducing into a mold having a filament disposed therein a slurry containing a liquid vehicle and particles of a refractory ceramic, said particles having a cylindrical shape and a diameter of generally less than a micron. The method further includes the step of removing the liquid vehicle from the slurry to leave behind a consolidated ceramic embedding the filament, and heating the ceramic having the embedded filament to further consolidate the ceramic to provide said ceramic having a density of at least 85% of theoretical density for the particular ceramic. The potted heating assembly having a ceramic potting embedding a filament heater is provided having higher post-sinter density than prior assemblies and has substantially higher strength.

REFERENCES:
patent: 4427916 (1984-01-01), Shroff
patent: 4893052 (1990-01-01), Tanabe et al.
patent: 4904897 (1990-02-01), Van Esdonk et al.

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