Effects of uniaxial stress on the piezoelectric, dielectric, and mechanical properties of lead zirconate titanate piezoceramics

Dielectric Properties of Pb(Zr1/2Ti1/2)O3-Pb(Zn1/3Nb2/3)O3Ceramics Under Compressive Stress Applied Perpendicular to Electric Field

“…The changes in the dielectric loss tangent are, on the other hand, opposite to those of the parallel stress case. For the case of the compressive stress applied perpendicular to the direction of the electric field, only few previous experimental works have been carried out on some commercial hard and soft PZT ceramics, PIN-PT and PMN-PT ceramics [17,18,24,26,33,34]. Interestingly, the results observed in this present study are generally very similar to those obtained earlier in the Pb-based perovskite ceramics mentioned above.…”

Parametric Study of Bolt Clamping Effect on Resonance Characteristics of Langevin Transducers with Lumped Circuit Models

“…Proper pre-load torque maintains the solid contact of each interface between the acoustic stacks, and, in turn, longitudinal pressure transmits throughout the transducer with minimal mechanical loss. However, the piezoelectrical constant is decreased when the compressive stress becomes excessive [9]. Such a decrease may adversely affect both the polarization and mechanical loss of piezo-layers, leading to unexpected temperature surges [10].…”

The influence of tensile stress on inductively coupled piezoceramic sensors embedded in fibre-reinforced plastics

“…The piezoceramic transducers embedded in CFRP were able to record guided wave measurements after being loaded up to a tensile stress of 606 MPa, which is far greater than the 80 MPa tensile strength of NCE51. Depolarisation was believed to be responsible for the reductions in amplitude after the CFRP was subjected to high stress [3,4,5]. This is potentially a highly useful feature as the sensor is effectively able to record very high stresses that it has seen through this depolarisation, essentially acting as overload measurements.…”

“…Experimental work in the literature shows that the electromechanical properties of piezoceramics exhibit a stress dependence [1,2], and that the performance can be degraded through depolarisation when operated at high stress [3,4,5]. This behaviour depends on the composition of the piezoceramic, with different piezoceramic configurations exhibiting different sensitivities and abilities to resist mechanical stress [3].…”