Abstract
The conducting materials of carbon black, iron powder and carbon nanotube were doped into poly(vinylidene fluoride) (PVDF) and piezoelectric lead zirconate titanate (PZT) ceramics composite powder to prepare piezoelectric composite. The result showed that an appropriate doping phase could improve the polarization and piezoelectric properties of composite materials. Independently from the chemical nature of the doping phase, when its amount was equal to 0.6%, the piezoelectric voltage constant of piezoelectric composite reached the maximum value. When the added quantities, the power storage capacities of piezoelectric composites reached the peak value when the amount of added carbon black or iron powder was 0.6% and that of carbon nanotube was 0.9%.
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