Modification of the dielectric properties of polymeric materials

Measurements of filler, polymer and compound properties has shown that the Maxwell-Wagner theory gives reasonable prediction of the dielectric properties of a two component compound. Realisation of high permittivity is enhanced if polymer conductivity can be modified, e.g. by the use of additives. Polymeric materials modified to increase their permittivity by the use of fillers have been used successfully in electrical plant. However, potential improvements in plant performance may not be totally realised due to degradation of other properties (e.g. electric strength) compared with unfilled materials