PREPARATION AND PROPERTIES OF PIEZOELECTRIC COMPOSITES OF PZT/PVDF

PZT powder is made using oxide one off sintering technique. Its X ray diffraction (XRD) peaks are monitored and shown to be in crystallization phase of pure square with Zr/Ti equal to 52:48. The pattern of the PZT powder is observed with SEM; the mold technique of PVDF is analyzed by TG DTA. Six sorts of PZT/PVDF composites are obtained with different PZT volume ratios by compression mould/sintering technique. Tests of dielectric and piezoelectric show that electric parameter accretion increases nonlinearly with PZT content, when the volume content of PZT exceeds 70%, dielectric constant ε and piezoelectric constant d₃₃ increase rapidly, and when it reaches 90% the electric parameters are almost the same as the pure PZT's.