Author(s): PJ HARROP
An earlier treatment of temperature coefficient of capacitance, γc  has been extended to include most solids. Materials are divided into those with given ranges of permittivity, ε, and temperature coefficient of polarisability. It appears that, for low dielectric loss, high permittivity glasses, like simple ionic compounds, always have a positive γc, whereas paraelectrics and polymers have negative γc. Ferroelectrics can have any value of γc. Limitations in γc and ε for given classes of solid are discussed.