The dielectric properties and preparation method of BaTiO₃/PVDF 0–3 composites

Abstract

A series of 0–3 composites of the polyvinylidene fluoride (PVDF) and BaTiO₃ was prepared. BaTiO₃ was modified with titanate coupling agent. The dielectric properties and the interfacial interaction of composites by different preparation methods were examined and compared. The result shows that the relative dielectric constant ∈ of the composite prepared in solution has a maximum value at about 70% weight fraction of BaTiO₃ and the dielectric loss tanδ increases rapidly when the fraction exceeds 70%. For the composite prepared in melt, the relative dielectric constant ε almost reaches a maximum value at about 60% weight fraction of BaTiO₃ and the dielectric loss is comparatively lower. The dielectric properties of composites are improved by using a coupling agent.

Keywords

BaTiO₃/PVDF / dielectric constant / dielectric loss

References

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