Effects of one-dimensional stress on piezoelectric ceramics

Abstract

Articles you may be interested inModeling of piezoelectric ceramic vibrators including thermal effects. Part III. Bond graph model for onedimensional heat conduction Highly accurate data obtained from measurements on three different formulations of lead zirconate titanate piezoelectric ceramic material show the dependence of g3J' d)), and Kj3 on one-dimensional stress (applied parallel to the direction of polarization) to high values of stress (0-400 MPa). The constants for one type of ceramic vary with stress less than those of the other two types for high values of stress. A peak in the curve of tanS as a function of T3 for two types of materials is a function of the material, and it is believed that the peaks are due to a phase transition from the ferroelectric tetragonal to the ferroelectric rhombohedral state. The experimental feasibility and practicability of using a reciprocity coupler to measure g33 and Kr3accurately as a function of one-dimensional stress to high values of stress has been established.

Stress‐Enhanced Displacements in PLZT Rainbow Actuators

“…The samples used were first poled with a sufficiently high electric field, and the applied electric fields composition of a ceramic, as well as temperature. [10][11][12][13] Enhancement of the extrinsic piezoelectric effect by prestressing a ceramic has been demonstrated in a work by several investigators, 14,15 in which a larger piezoelectric effect was obtained when a compressive stress of appropriate magnitude was applied along the direction of the poling axis. This phenomenon can be explained by the stress-enhanced domain reorientation.…”

Electromechanical Properties of a Ceramic d31‐Gradient Flextensional Actuator

“…This field-dependent behavior is attributed to the non-180°domain motion, 23 which further relates to the stress in the PZT ceramics. 22 At the electric field of 1 ϫ 10 6 V/m used in the experiment, field-enhanced domain switching could increase the d 31 , resulting in h c higher than the calculated values that are based on the low-field d 31 .…”

“…The piezoelectric properties of PZT ceramics with a composition near the morphotropic phase boundary (MPB) can vary significantly with the electric field and the stress. A unidirectional compressive stress has been shown to reduce the piezoelectric coefficients 22 and a transverse tensile stress is shown to enhance the domain reorientation and hence a larger d 31 . 22 Li et al 13 also suggested that the higher-than-expected h c of the Rainbow transducer was a result of a stress-enhanced d 31 in the actuator.…”

“…A unidirectional compressive stress has been shown to reduce the piezoelectric coefficients 22 and a transverse tensile stress is shown to enhance the domain reorientation and hence a larger d 31 . 22 Li et al 13 also suggested that the higher-than-expected h c of the Rainbow transducer was a result of a stress-enhanced d 31 in the actuator. Assuming that the bending of the actuator after sintering is purely elastic, the residual stress could be estimated from the dome curvature of the actuator.…”

Nonlinear Performance Limits for High Energy Density Piezoelectric Bending Actuators

“…This is easily explained by the presence of stress based d 31 enhancement. It has been shown [1], [13], [26], [27] that compressive stress on PZT degrades the piezoelectric coupling coefficients while tensile stress causes an enhancement. Applying a load to the distal end of a bimorph actuator puts the PZT plate which is doing work on the load in tension, causing the above phenomena.…”