Working principle and structure of the negative temperature coefficient thermistor

Thermistor is a sensitive element mainly divided into positive temperature coefficient thermistor and negative temperature coefficient thermistor, has small volume, easy to use, good stability and other advantages. Engineering today is for everybody to introduce specific working principle and composition of negative temperature coefficient thermistor, hope you can help to you.

working principle of the NTC (Negative Temperature Coefficient thermistor

is the NTC Negative Temperature Coefficient, mean a Negative Temperature Coefficient, referring to a Negative Temperature Coefficient of semiconductor materials or components, a NTC thermistor is a Negative Temperature Coefficient thermistor. It was based on the manganese, cobalt, nickel and copper metal oxide as the main material, adopting ceramic manufacture process. These properties are semiconductor metal oxide materials, because on the way of conducting full semiconductor materials such as germanium and silicon. At low temperature, these oxide material carrier ( Electronic and cavity) Number less, so the resistance value is higher; With the increase of temperature, carrier number increase, so the resistance reduced. NTC thermistor in room temperature range in the 10 o Ω ~ 1000000 Ω, temperature coefficient - 2% ~ - 6. 5%. NTC thermistor NTC thermistor is widely used for measuring temperature, temperature control, temperature compensation, etc.

NTC (negative temperature coefficient thermistor constitute

the NTC ( 负温度系数) Refers to the resistance with the temperature rising exponential relationship between the decrease, the phenomenon has a negative temperature coefficient thermistor and materials. The material is the use of manganese, copper, silicon, cobalt, iron, nickel, zinc and other two or more metal oxide by fully mixing, molding, sintering process of semiconductor ceramic, negative temperature coefficient (can be made with NTC) The thermistor. The resistivity and material constant as material composition, sintering atmosphere, sintering temperature and structure of the state. Now also appeared with silicon carbide, selenide such as tin, tantalum nitride oxide of NTC thermistor materials.

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