About Us | Electronic Heating FAQ | Contact Us  
Technical Support
¡¤FAQ about PTC Heaters
¡¤FAQ about Electronic Heating Films
¡¤FAQ about Ceramic | Metal Heaters
FAQ about PTC Heaters
Organizational structure of PTC thermistor and principle of functions


Ceramic materials are usually good for high-insulation resistance, ceramic PTC thermistor is barium titanate-based and doped with other polycrystalline ceramic materials in manufacturing.

It has lower resistance and semi-conducting properties.


It is realized by doping a material of higher chemical valence (acting as Dot Matrix Element):

In the crystal lattice, Barium or Titanate ion were taken place by the ions of higher valence, it create some free electrons with electro-conductivity. For the PTC thermistor, it is the reason of resistance¡¯s increasing.

The effect is counteracted when the temperature is low.

If the temperature rise higher, the resistance increase greatly accordingly, too.

This is just called ¡°PTC effect¡±.




Copyright © Shanghai MinKia Electronic Technology Research Institute. All Right Reserved.