Abstract
The objective of this work is to investigate the dependence of the electric behavior on shock pressure in Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 (PZT 95/5-2Nb) and Pb0.99[(Zr0.90Sn0.10)0.96Ti0.04]0.98Nb0.02O3 (PZST) ferroelectric ceramics under shock wave compression. PZT 95/5-2Nb and PZST ceramics were subjected to high dynamic pressure generated by plate impacts. The output currents were measured under the short-circuit condition in the pressure range from 0.23 to 4.50 GPa. The evolution of the electric response exhibits three distinct regions: (1) Below the critical phase transition pressure (σC), alternate negative and positive piezoelectric currents are observed and the corresponding piezoelectric constant is e 31. (2) Above σC and below the complete phase transition pressure (σH), released charge increases with increasing shock pressure, illustrating the transition of ferroelectric to antiferroelectric phase. (3) Above σH, the output current is insensitive to the shock pressure. A similar evolutionary process is also observed in hydrostatic and uniaxial stress experiments.
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