Structural contribution to the ferroelectric fatigue in lead zirconate titanate ceramics

Abstract

Many ferroelectric devices are based on doped lead zirconate titanate (PZT) ceramics with compositions near the morphotropic phase boundary (MPB), at which the relevant material's properties approach their maximum. Based on a synchrotron X-ray diffraction study of MPB PZT, bulk fatigue is unambiguosly found to arise from a less effective field induced tetragonal-tomonoclinic transformation, at which the degradation of the polarisation flipping is detected by a

Cyclic electric field response of morphotropic Bi1/2Na1/2TiO3-BaTiO3 piezoceramics

“…Similar to commercial lead containing piezoceramics, 34 the phase coexistence is the key for the enhanced piezoelectric properties. Additionally, BNT-xBT reveals similar to the lead containing material 25 that cycling has the opposite effect on the phase composition compared to applying a single electric field. Therefore, this study indicates that the phase composition is not only dependent on the chemical composition but also on the state and nature of the applied field state.…”

“…A comparable tendency could recently be observed for a fatigued actuator material based on lead zirconate titanate. 25 Therefore, for the tetragonal-like material a second phase increases with applied electric field. However, comparing the remanent states at 0 kV/mm, the phase fraction of the fieldinduced phase is lower after fatiguing for 10 7 cycles.…”

“…Several mechanisms, 19,20 like microcracking, 21,22 drift of charge carriers, 23,24 and structural changes, 25 have been reported to contribute to fatigue. This investigation is focused on structural changes caused by electric cycling, which leads to material degradation and thus fatigue.…”

Critical Role of Monoclinic Polarization Rotation in High-Performance Perovskite Piezoelectric Materials

“…S1(a), of the Supplemental Material [ 26 ]), the 4 diffraction patterns at the 45° sectors contain negligible effects of preferred 5 orientation, which allows extracting the important piezoelectric-related structure 6 information, such as the polarization rotation behavior. This strategy to minimize the 7 effect of preferred orientation is analogous to the important method reported by 8 Hinterstein et al [16,36]. The in-situ diffraction data were collected during the 9 unloading procedure from an electric field near the coercive field (E C ) to zero electric 10 field (E = 0 kV/mm).…”

Fatigue effect on polarization switching dynamics in polycrystalline bulk ferroelectrics

“…10,11,17,[47][48][49][50] Moreover, in a previous study by the present authors the polarization responses in differently fatigued specimens by means of the IFM-model were already…”