The dynamic energy-harvesting characteristics of a lead zirconate titanate ceramics (PZT-5A) exposed to gunfire mechanical excitation with high-amplitude and long-duration are investigated for military application of in-flight power source for small-caliber electronic fuze. The PZT-5A subjected to mechanical stress generates electric polarity in itself. The PZT-5A energy-harvester, composed of a ring-shaped PZT-5A element, a cylindrical proof mass, a case, and a load circuit with a diode and a storage capacitor, is prepared to characterize the energy-harvesting and energy-charging behaviors of PZT-5A. The laboratorial PZT-5A test at the acceleration range of 100 to 2000 g's and the gunfire test accompanied by the acceleration of 65000 g's are conducted. The experimental study on the piezoelectric behaviors of PZT-5A element under dynamic mechanical stress demonstrates the peculiar physicoelectrical phenomena including the dependence of piezoelectric constant on the load rate, the shock-aging of piezoelectric effect, the energy-harvesting characteristics under strong depolarization, and the dependence of energy transfer efficiency on the integral of acceleration with respect to time.
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