Preparation of chip type negative temperature coefficient thermistor

Abstract

A thermistor is a class of resistor whose resistance varies with temperature. The two types of thermistors are Negative temperature coefficient (NTC) thermistor and Positive temperature coefficient (PTC) thermistor. NTC thermistors have a negative electrical resistance versus temperature (R/T) relationship. These thermistors are extremely versatile and accurate. This makes them best for a wide variety of applications that measure temperature. They find application in firebrand photographic processing, meteorological, geological, and oceanographic research equipment, as well as in consumer and household appliances. This paper presents the development of a chip-type Mn-Ni based negative temperature coefficient thermistor with varying CuO (Dopant) concentration. The changes in electrical properties are also reported. The expected results indicate an increase in resistivity, material constant and temperature coefficient of resistance (a) with an increase in CuO concentration for all the compositions.