Background: Compositionally modified Pb(Zr0.95Ti0.05)O3 (PZT 95/5) ferroelectric materials
have been extensively investigated in past decades for many important applications. However, few
study on pure PZT95/5 ceramics have been reported.
Objective: Herein, pure PZT95/5 ceramics were successfully prepared, and their microstructure and
phase transition behaviors under external fields were studied.
Methods: The pure PZT95/5 ceramics were prepared by the conventional solid state reaction using a
mixed oxide route. The microstructure and its properties under different external fields were measured.
Results: The X-ray diffraction patterns indicated that the virgin pure PZT95/5 ceramics exhibit an
orthorhombic antiferroelectric phase, which has also been evidenced by the superlattice reflections in
the SAED pattern. While a rhombohedral ferroelectric symmetry crystal structure was observed in the
poled samples suggesting that an electric field induced antiferroelectric to ferroelectric phase transition
takes place. Pure PZT95/5 ceramics exhibit a quenched ferroelectric hysteresis loop with a remnant
polarization of ~8μC/cm2 under 3.5kV/mm. Temperature dependence dielectric response indicated that
the orthorhombic antiferroelectric to cubic paraelectric phase transition occurs at 225°C, corresponding
to its Curie temperature. A shard depolarization behavior and dielectric anomalies were observed under
~240 MPa hydrostatic pressure.
Conclusion: The depolarization mechanism of pure PZT95/5 ceramics under hydrostatic pressure is
attributed to the hydrostatic pressure-induced FE-AFE phase transition. These results will offer fundamental
insights into PZT95/5 ceramics for pulsed power supply applications.