Temperature coefficients of capacitance of solids

An earlier treatment of temperature coefficient of capacitance, _c 1] has been extended to include most solids. Materials are divided into those with given ranges of permittivity, , and temperature coefficient of polarisability. It appears that, for low dielectric loss, high permittivity glasses, like simple ionic compounds, always have a positive _c, whereas paraelectrics and polymers have negative _c. Ferroelectrics can have any value of _c. Limitations in _c and for given classes of solid are discussed.