Stress-induced depolarization of single-layer PZT 95/5 ferroelectric films

Abstract

Ferroelectric (FE) films are widely used in electronic devices and low-power FE transducers. There is significant interest in expanding the usage of FE films to ultrahigh-power systems. The results are reported herein on experimental investigations of stress-induced depolarization of single-layer PbZr0.95Ti0.05O3 doped 2% Nb (PZT 95/5) poled FE films subjected to uniaxial adiabatic compression perpendicular and antiparallel to the direction of polarization. It was found that at a stress of 2.4 GPa, the 32-μm-thick films underwent a pressure induced transition to a nonpolar antiferroelectric phase and became completely depolarized in both modes of high strain rate loading. The experimental results indicate that the behavior of stress-induced current generated by longitudinally compressed films is more complicated than under transverse stress. This complex behavior may be caused by the short stress wave transit distance through the film, that is, comparable with the thickness of the stress wave front. The important result is that the specific electric charge released by PZT 95/5 films under stress, 104 μC/cm3, is more than an order of magnitude higher than that released by bulk PZT 95/5 ceramic specimens. It was experimentally demonstrated that transversely compressed miniature PZT 95/5 film specimens with volume less than 1 cm3 are capable of producing pulses of hundreds of amperes of current. This study promises FE film applications in ultrahigh-power systems.

Shock‐driven depolarization behaviors and electrical output in BiAlO3‐doped Bi0.5Na0.5TiO3 ferroelectric ceramics

“…Herein, shock‐driven depolarization behaviors and current output of 0.92Bi 0.5 Na 0.5 TiO 3 ‐0.08BiAlO 3 (BNT‐8BA) are investigated under shock compression. In the previous works, the co‐author of Genshui Wang has reported P r = 36 µC/cm 2 for BNT‐8BA, 32 which is slightly smaller than that of pure BNT ( P r = 38 µC/cm 2 ) and larger than that of PZT95/5 ( P r = 34 µC/cm 2 ) 14,17 . In combination with the low phase transition pressure and relatively high P r , the BNT‐8BA was expected for applying ferroelectric power devices.…”

“…Among these, PZT95/5 ceramics are noteworthy, as these show a high P r of 34 µC/cm 2 and good current output behaviors under compression. 14,17 The current output of PZT95/5 ceramics during compression is due to a ferroelectric-antiferroelectric phase transition triggered by high pressure. [18][19][20] Although lead-based ferroelectric materials exhibit superior properties, the pursuit of environmentally friendly candidates is still ongoing.…”

“…In the previous works, the co-author of Genshui Wang has reported P r = 36 µC/ cm 2 for BNT-8BA, 32 which is slightly smaller than that of pure BNT (P r = 38 µC/cm 2 ) and larger than that of PZT95/5 (P r = 34 µC/cm 2 ). 14,17 In combination with the low phase transition pressure and relatively high P r , the BNT-8BA was expected for applying ferroelectric power devices. In addition, the structure of BNT-8BA was examined under high pressure to determine the electrical output using in-situ synchrotron X-ray diffraction (XRD).…”

“…Till date, high‐ P r ferroelectric materials based on lead‐containing components such as Pb(Zr 0.52 Ti 0.48 )O 3 (PZT52/48) ceramics, 12,13 Pb(Zr 0.95 Ti 0.05 )O 3 (PZT95/5) ceramics, 4,11,12,14 and Pb(In 1/2 Nb 1/2 )O 3 ‐Pb(Mg 1/3 Nb 2/3 )O 3 ‐PbTiO 3 (PIN‐PMN‐PT) crystals 15,16 have been extensively studied. Among these, PZT95/5 ceramics are noteworthy, as these show a high P r of 34 µC/cm 2 and good current output behaviors under compression 14,17 . The current output of PZT95/5 ceramics during compression is due to a ferroelectric–antiferroelectric phase transition triggered by high pressure 18‐20 …”

Strain Rate and Porosity Effect on Mechanical Characteristics and Depolarization of Porous Poled PZT95/5 Ceramics

“…Zirconium-rich lead titanate Pb(Zr 0.95 Ti 0.05 )O 3 (PZT95/5) ferroelectric ceramics exhibit a transformation from the ferroelectric phase (FE) to the antiferroelectric phase (AFE) in response to compressive stress [ 1 , 2 , 3 , 4 ], and they have been utilized in pulsed power applications for many years [ 4 , 5 , 6 , 7 ]. In these applications, electrical energy is stored in the PZT95/5 ceramics by an initial poling process and released into an electrical load by an externally applied shock-wave loading.…”