Fabrication and characterization of composites of a perovskite and polymers with high dielectric permittivity

Composites of strontium titanate (SrTiO3) at loadings up to 50 vol.% with polar poly(butylene terephthalate) (PBT) and non-polar linear low density polyethylene (LLDPE) were prepared investigate their dielectric responses in the wireless frequency range. The SrTiO3 particles uniformly dispersed polymers loadings, but more bead-like agglomerated higher loadings. has a strong nucleating effect on both polymers, increasing crystallization temperature reducing crystallinity polymers. Dielectric properties composites measured between 2.45?5 GHz. permittivity (?') 2.45 GHz increased content. ?' by factor 5 for PBT, from 3.7 unfilled PBT 16.5 ?8.5 LLDPE, 2.3 19.7 maximum loading. had similar dissipation values as Lichtenecker model was good agreement experimental data.