Lead zirconate titanate (PZT)/polyvinylidenc 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 εr and dissipation tanδ increase monotonously by increasing the voltme fraction of PANI in the composite.The piezoelectric constant d33, and the planar electromechanical coupling factor kp increase while the mechanical quality factor Qm decreases with the increase in the content of PANI.The d33 , kp and Qm show the extremum valnes at 8 vol%-10 vol% PANI.
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