Electrically conductive sintered ceramics and ceramic heaters

Details Electrically conductive sintered ceramics and ceramic heaters Electrically conductive sintered ceramics and ceramic heaters

1983-05-24

1985-11-26

Barr, Josephine L.

Compositions

Electrically conductive or emissive compositions

Carbide containing

252518, 252520, 219553, 428446, 501 89, 501 91, 501 92, 373117, H01B 104

Patent

active

045553580

ABSTRACT:
An electrically conductive sintered ceramics of the present invention comprises, as the main ingredients thereof, (a) silicon carbide, (b) an inorganic compound which exhibits a positive resistance-temperature coefficient, and preferably (c) a sintering assistant. The electrically conductive sintered ceramics obtained exhibits a positive resistance-temperature coefficient as a whole.
A ceramic heater of the invention makes use of the electrically conductive sintered ceramics in an electrically conductive portion thereof.
A sintered product which exhibits a positive resistance-temperature coefficient helps to prevent the occurrence of thermal runaway or thermal destruction.

REFERENCES:
patent: 3404202 (1968-10-01), Carlson et al.
patent: 3875476 (1975-04-01), Crandall et al.
patent: 3895219 (1975-07-01), Richerson et al.
patent: 3993602 (1976-11-01), Prochazka
patent: 4209474 (1980-06-01), Prochazka

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