Abstract
Kinetics of the ferroelectric (FE) to antiferroelectric (AFE) phase transformation under shock wave compression is critical to design the shock-activated power supply and can be characterized in terms of both a transition rate and a limiting degree of transition. By measuring the depoling currents under the short-circuit and high-impedance conditions, we investigated the influence of shock pressure and self-generated electric field on the phase transition kinetics of tin-modified lead zirconate titanate ceramics (Pb0.99Nb0.02[(Zr0.90Sn0.10)0.96Ti0.04]0.98O3) in the pressure range from 0.23 to 4.50 GPa. Experimental results indicate that the shock pressure promotes the FE-to-AFE phase transition. And the self-generated electric field does not appear to have a significant effect on the depoling currents at high shock pressures, but has a strong effect at low pressures. At 0.61 GPa and 1.03 GPa, transition rate and degree diminish with increasing the electric field, illustrating that the self-generated electric field suppresses the FE-to-AFE phase transition. These observations are found to be generally consistent with results under the hydrostatic compression. Fundamental issues are discussed from the perspective of the soft mode theory.
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