Manganese-based spinel semiconducting ceramic was mixed with lanthanum oxide powder and the mixture was characterised for the reproducible negative temperature coefficient (NTC) of resistance behaviour. The same mixture was used for the fabrication of 15 m long continuous thermal detector. The addition of La2O3 leads to decrease in thermistor constant and activation energy values, thus giving freedom to fabricate thermal sensors for various temperature applications. A 3 m long continuous thermal detector for application in the temperature range 275–350°C was fabricated and later coupled to form a continuous unit of 15 m length.
Negative temperature coefficient, thermistor, temperature coefficient of resistance
