Longitudinal Shock Wave Depolarization of Pb(Zr₅₂Ti₄₈)O₃ Polycrystalline Ferroelectrics and Their Utilization in Explosive Pulsed Power
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A poled lead zirconate titanate Pb(Zr52Ti48)O3 (PZT) polycrystalline piezoelectric ceramic energy-carrying element of a compact explosive-driven power generator was subjected to a longitudinal explosive shock wave (the wave front traveled along the polarization vector P0). The shock compression of the element at pressures of 1.5-3.8 GPa caused almost complete depolarization of the sample. Shock wave velocity in the PZT was determined to be 3.94 ± 0.27 km/s. The electric charge stored in a ferroelectric, due to its remnant polarization, is released during a short time interval and can be transformed into pulsed power. Compact explosive-driven power sources utilizing longitudinal shock wave depolarization of PZT elements of 0.35 to 3.3 cm3 volume are capable of producing pulses of high voltage, with amplitudes up to 22 kV, and up to 350 kW peak power.