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PVDF with 0, 2, 4, 6, 8, 10 mole% of PZT has been prepared by the solvent casting method. Prominent β phase has been observed from the XRD, FT-IR and Raman studies. The polarization of these samples starts at high field of 100 kv/cm and it increases with the increase in applied electric field. The 4 mole% PZT doped PVDF shows maximum polarization and high coercive field. The coercive field also increases with the increase in applied electric field. Hence, 4 mole% PZT doped PVDF composites can be used in high electric fields applications. [ABSTRACT FROM AUTHOR]

Electromagnetic radiation (EMR) from soft and hard PZT under the drop weight impact have been studied. Due to impact the PZT undergoes a deformation wave which causes oscillations of dipoles within the PZT which give rise to electromagnetic radiation. The peak EMR voltage and the average EMR energy release rate show a linearly increasing pattern with the height of impact suggesting that these parameters could be used for monitoring excessive deformation from the structures. EMR peak voltage and average EMR energy release rate obtained from the soft PZT SP-5A are 43.42% and 53.12% higher respectively from those obtained from the hard PZT SP-4 owing to the higher resistance offered by the hard PZT to the domain switching. [ABSTRACT FROM AUTHOR]