Electric heating – Heating devices – Resistive element: igniter type
Patent
1986-02-25
1987-02-17
Goldberg, E. A.
Electric heating
Heating devices
Resistive element: igniter type
123145A, 219553, 338326, 338330, 361264, 361266, F23Q 722, F02N 1700
Patent
active
046441336
ABSTRACT:
A ceramic heater has a heater element made of a mixture including MoSi.sub.2 and Si.sub.3 N.sub.4 powder as a main ingredient and silica (SiO.sub.2) powder as an additive, a heater support member made of an electrically insulating ceramic sintered body for supporting the heater element and an electric current supply means for supplying an electric current to the heater element. The composition of the mixture for the heater element is defined so as to satisfy the following formula: 0.035.ltoreq.B/A<0.35 where A is the amount of Si.sub.3 N.sub.4 expressed by mol percent of the total amount of the main ingredient of MoSi.sub.2 and Si.sub.3 N.sub.4 and B is the amount of SiO.sub.2 expressed by mol percent of the total amount of the main ingredient of MoSi.sub.2 and Si.sub.3 N.sub.4.
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Atsumi Morihiro
Ito Novuei
Mizuno Naohito
Nunogaki Naochika
Goldberg E. A.
Nippon Soken Inc.
Nippondenso Co. Ltd.
Preston Gerald E.
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