Ceramic heater and a process for producing the same

Details Ceramic heater and a process for producing the same Ceramic heater and a process for producing the same

1985-10-25

1987-03-24

Griffin, Donald A.

Electric heating

Heating devices

With heating unit structure

29612, H05B 308, H01C 704

Patent

active

046527273

ABSTRACT:
The ceramic heater of the present invention is used as a regenerating heater for a carbon particulate collecting filter. The ceramic heater comprises a heat-generating body composed of a sintered body which comprises an electroconductive ceramic, such as titanium nitride, and an insulating material, such as silicon nitride. An electroconductive layer is formed on a selected portion of the surface of the heat-generating body. The ratio of the electroconductive ceramic ingredient of the electroconductive layer is greater than the ratio of the electroconductive ceramic ingredient of the heat-generating body. The electroconductive layer of the ceramic heater is formed by partially heat-decomposing silicon nitride.

REFERENCES:
patent: 3067310 (1962-12-01), Walz et al.
patent: 3266661 (1966-08-01), Dates
patent: 3775843 (1973-12-01), Wenot
patent: 4385226 (1983-05-01), Sauer
patent: 4449039 (1984-05-01), Fukazawa et al.

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