Chemistry: electrical and wave energy – Processes and products
Patent
1982-05-20
1985-09-17
Tung, T.
Chemistry: electrical and wave energy
Processes and products
204424, 204425, 204426, 204427, 219200, 219482, 219505, 219553, 338 7, 338 9, 338 22R, 338 22SD, G01N 2746, H05B 310
Patent
active
045418985
ABSTRACT:
A heating element comprises a resistor comprising a plurality of fine particles or thin films having a negative temperature coefficient of electrical resistance, and highly resistant region layers interposed between the fine particles or thin films, at least two separate electrodes arranged in contact with different particles or layers of the resistor, and means for applying across said electrodes an AC electric voltage, said means operable at AC frequencies which are not lower than a frequency whose complex impedance characteristics which when graphed in the manner shown in FIG. 4 hereof correspond to point B of said graphed complex impedance characteristics. This heating element has the following merits that it can be formed into an optional shape, is low in the power consumption, can be rapidly heated, has temperature self-adjusting performance and temperature detecting performance and is excellent in the durability.
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Mase Syunzo
Soejima Shigeo
NGK Insulators Ltd.
Tung T.
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