Development of PTC and NTC

Thermistors are a class of sensitive components, which are divided into PTC and NTC according to different temperature coefficients.

PTC development history: appeared in 1950. In 1954, a PTC thermistor with barium titanate as its main material appeared. PTC thermistors are used in industry for temperature measurement and control, and also for temperature detection and adjustment in certain parts of automobiles. They are also widely used in civilian equipment. Such as controlling the water temperature of the instant water heater, the temperature of the air conditioner and the cold storage, using its own heating for gas analysis and wind speed.

NTC development history: The development of NTC thermistors has gone through a long period. In 1834, scientists discovered that silver sulfide has a negative temperature coefficient. In 1930, scientists discovered that cuprous oxide-copper oxide also has a negative temperature coefficient and successfully used it in temperature compensation circuits for flight instruments. Subsequently, due to the continuous development of transistor technology, significant progress has been made in thermistor research. In 1960 NTC thermistor was developed.