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Volume 1, Issue 1
  • ISSN: 2666-7312
  • E-ISSN: 2666-7339

Abstract

Compositionally modified Pb(ZrTi)O (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.

Herein, pure PZT95/5 ceramics were successfully prepared, and their microstructure and phase transition behaviors under external fields were studied.

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.

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 225oC, corresponding to its Curie temperature. A shard depolarization behavior and dielectric anomalies were observed under ~240 MPa hydrostatic pressure.

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.

© 2022 Bentham Science Publishers
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/content/journals/cam/10.2174/2666731201666210705100828
2022-04-01
2024-11-26

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/content/journals/cam/10.2174/2666731201666210705100828
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Pure PZT95/5 Ceramics and Its Phase Transition Behavior Under External Fields
Curr. Appl. Mat. 1, e050821194453 (2022); https://doi.org/10.2174/2666731201666210705100828
/content/journals/cam/10.2174/2666731201666210705100828
/content/journals/cam/10.2174/2666731201666210705100828
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  • Article Type:     Research Article
Keyword(s): antiferroelectric; depolarization behavior; hydrostatic pressure; phase transition; pulsed power supply; PZT95/5

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