Dielectric and piezoelectric properties of 0-3 PZT/PVDF composite doped with polyaniline

Abstract

Lead zirconate titanate (PZT)/polyvinylidene fluoride (PVDF) 0-3 piezoelectric composites doped with polyaniline (PANI) were obtained by hot-press method. The polarization properties of the composites were characterized by XRD and P-E hysteresis loops at room temperature. And the dielectric and piezoelectric properties were also measured. The results show that the poling of PZT could be effectively carried out and the dielectric constant ε_r, and dissipation tanδ increase monotonously by increasing the volume fraction of PANI in the composite. The piezoelectric constant d₃₃, and the planar electromechanical coupling factor k_p increase while the mechanical quality factor Q_m decreases with the increase in the content of PANI. The d₃₃, k_p and Q_m show the extremum values at 8 vol%-10 vol% PANI.

Keywords

piezoelectric composite / polyaniline / dielectric properties / piezoelectric properties

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