Ceramic heater and process for producing the same
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United States of America Patent
Stats
-
Oct 10, 2000
Grant Date -
N/A
app pub date -
Dec 5, 1997
filing date -
Dec 11, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This ceramic heater is increased in bulk density and decreased in production cost by using an unsintered composite as an unsintered filling member filled in a protective pipe without application thereto of a filling pressure while preventing a heating element from deteriorating. In this ceramic heater, the heating element capable of heating by flowing electricity therethrough is disposed in the protective pipe, which is filled with the unsintered composite. In the unsintered composite, inorganic compound particles are disposed between insulating ceramic particles. In this ceramic heater, the heating element is fixed to the inner wall surface of the protective pipe with a heat-resistant glass layer. The heat-resistant glass layer is partially penetrated into the unsintered composite. The open end portion of the protective pipe is hermetically sealed with a heat-resistant sealing member while allowing extension of lead wires from the end portion of the protective pipe.
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