Ceramics can display a variety of useful electrical and magnetic properties.Silicon

Some ceramics are good conductors such as graphite while some have high resistivity such as SiC which is used in heating elements.

 

Unlike in metals, the conductivity of ceramics increases as temperature increases. This is because conduction is based on the movement of anions and cations. Mobility of the ions is only possible when there is enough thermal heating to supply sufficient energy.