Study of dielectrical properties of a new high permittivity material

High permittivity material is usually used to achieve larger stored energy in capacitors. In particular, many high permittivity materials has been used to achieve excellent stress control at cable terminations. In our paper we have investigated the dielectric properties of a new high permittivity BaTiO₃/Al/LDPE composites with volume fraction of metal Al 0.20 and volume fraction of BaTiO₃ from 0.10 to 0.40 at various temperatures and frequencies. Resistivity of the materials as a function of volume percent BaTiO₃ powder were measured at temperatures. Dielectric constant of the materials are compared with the two-component composites containing Al/LDPE and BaTiO₃/LDPE over a wide rang of volume loading. In theory we propose to improve the effective cluster model for disordered suspension of conducting particles exhibiting substantial permittivity enhancements, and to extend it to be applicable to three-components systems, containing conducting particles, ferroelectric ceramic and polymer insulator. Dielectric experimental data are needed for meaningful comparison between theory and experiment