Nanocomposite has potential to become high energy density dielectrics

hence it has huge potential in impulse and energy storage fields. Consequently

we analyzed the crystalline behaviors and dielectric characteristics of BaTiO

3

/α–PVDF and BaTiO

3

/γ–PVDF nanocomposite matrices through XRD

DSC

and dielectric spectrum. The results showed that the permittivity of 10%BaTiO

3

/α–PVDF was 30; however

the permittivity of 10%BaTiO

3

/γ–PVDF was 52 at room temperature which was much higher than that of α phase nancomposites. The results also showed that

in low filler volume BaTiO

3

/PVDF composites

the crystalline properties played a main

role in Maxwell-Wagner polarization intensity. Utilizing one-dimension crystal distribution model

we characterized the density of boundary in nanocomposites. According to the site of loss peak

we found there was negative relation between density of boundary in nanocomposites and Maxwell-Wagner polarization relaxation time. The conclusion can provide a method to control nanocomposites’ dielectric characteristics under low frequent using Maxwell-Wagner polarization.