**Author details**

*Multifunctional Ferroelectric Materials*

**102**

**3.6 Conclusions**

*function of frequencies.*

**Figure 14.**

The micro-structural, ferroelectric, piezoelectric, dielectric and conductivity properties of the polymer composites have been analyzed and are correlated. The properties strongly depend on the novel cold pressing preparation techniques and the dispersion of *n*-BaTiO3 filler particles into the PVDF matrix and also on the nano-sizes of ceramics. The addition of *n*-BaTiO3 enhances the ferroelectric, piezoelectric and dielectric properties of the composites. It is also found that this cold pressing method is more suitable to the PCC based on PVDF matrix (since very low value of Tanδ is observed). The spherulites present in PVDF matrix are always helpful in maintaining the dielectric constant and increasing the ɛeff of PCC. The enhancement of dielectric results are explained with the help of standard Yamada model. The mixed conductivity appears for the PD/PF and Jonschers universal fractional power law is well satisfied for all composites. The hoping conduction in these disordered materials have been confirmed in all PCC. The dynamics of

*(color online) the variation of (a)* σ*eff experimentally and (b)* σ*eff fitted with Johnscher's power law, as a* 

Maheswar Panda Department of Physics, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar, M.P., India

\*Address all correspondence to: panda.maheswar@gmail.com

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