Effect of uniaxial compressive pre-stress on ferroelectric properties of soft PZT ceramics

Abstract

The effect of uniaxial compressive pre-stress on the ferroelectric properties of commercial soft PZT ceramics is investigated. The ferroelectric properties under the uniaxial compressive pre-stress of the ceramics are observed at stress up to 24 MPa using a compressometer in conjunction with a modified Sawyer–Tower circuit. The results show that the ferroelectric characteristics, i.e. the area of the ferroelectric hysteresis (P–E) loops, the saturation polarization (Psat), the remanent polarization (Pr), and the loop squareness (Rsq) decrease with increasing compressive pre-stress, while the coercive field (Ec) is virtually unaffected by the applied stress. The stress-induced domain wall motion suppression and non-180° ferroelectric domain switching processes are responsible for the changes observed. In addition, a significant decrease in these parameters after a full cycle of stress application has been observed and attributed to the stress-induced decrease in the switchable part of the spontaneous polarization at high stress. Furthermore, the permittivity calculated from the P–E loops is found to decrease with increasing applied pre-stress. This finding differs considerably from the results in the low-field experimental condition. Finally, this study clearly shows that the applied stress has a significant influence on the ferroelectric properties of soft PZT ceramics.

Monte Carlo Simulation of Ferroelectric Behavior in PZT Films by Using a Stress Dependent DIFFOUR Hamiltonian

“…A reduction in their area with the increase of stress, and thereby, a decrease in the coercive field can be observed due to non easy alignment in z direction, Table 2. Experimental data on ferroelectrics and in particular on PZT systems coincide reasonable well with this simulated behavior [24], [25], [26], [27]. On the other hand, the observed effect of an increasing field in the out-of-plane direction is the horizontal shift of the polarization curves, accompanied with higher values of polarization and minor deviating slopes, meaning a less defined critical temperature peaks for the corresponding susceptibility curves, Figure 3.…”

Preparation and characteristics of fine-grained ferroelectric glass-ceramic composites via a modified hybrid route at low temperature sintering

“…6(a-f), the best ferroelectric property is obtained in the 5 wt.% sample, the values of P s , P r and E c are 21.9 μC/cm 2 , 10.8 μC/cm 2 and 2.19 kV/mm, respectively. These values are smaller than those obtained from commercial soft PZT [29] which has the corresponding values of 39 μC/cm 2 , 26 μC/cm 2 and 7.8 kV/mm. On the basis of our results, we demonstrate that these fine-grained ferroelectric glassceramic composites have great potential for micro electronic component applications.…”

Domain switching energies: Mechanical versus electrical loading in La-doped bismuth ferrite–lead titanate

“…Values for the energy dissipation of PZT during electrical loading has been previously presented for a bipolar electric field with a maximum field amplitude of 2 kV/mm, which range between 810 (Ref. 18) and 1382 kJ/m 3 (Ref. 16).…”

“…8 External mechanical compressive stress has been found to strongly influence switching, 9,10 either suppressing or assisting domain reorientation processes. 4,[11][12][13][14][15][16][17][18][19][20][21][22] If the external applied stress is large enough domain switching may be suppressed completely. 12,14 However, small mechanical compressive stresses can also prompt an increase in ferroelectric properties.…”