Loss mechanisms in piezoceramic materials

Abstract

The scope of the paper is the experimental determined of the quality factor near resonance and antiresonance frequencies for a six unloaded unclamped piezoceramic plates (PZT5-H) samples. The electromechanical coupling coefficient (EMCC) of the samples are predicted using theoretical approach. The total losses tangent factor of the plate's materials PZT-5H was estimated from the variation of driving point electrical impedance over the interested frequency band rather than the sensitivity of each plate within this band. Experiments are conducted to verify the theoretical results with good agreement. dependence of the resonant and ant resonant frequencies and the electromechanical-coupling coefficient on the relative size of plate is analyzed. These results suggest that driving piezoelectric devices at anti-resonance mode may be an alternative in order to get improved efficiency in piezo device operation.

The Radial Electric Field Excited Circular Disk Piezoceramic Acoustic Resonator and Its Properties

“…These measurements allowed estimating to estimate the viscosity factor of piezoelectric ceramics η from the shape of the peaks of the resonance curve [ 16 ] where ω max is the circular resonance frequency and ∆ ω is the width of the resonance peak at level 0.707 of maximum. The values of η were calculated for all resonance peaks observed in the measuring range.…”

“…Measurement results are shown in Figure 3. These measurements allowed estimating to estimate the viscosity factor of piezoelectric ceramics η from the shape of the peaks of the resonance curve [16] η = ∆ω…”

A Perspective on Recent Advances in Piezoelectric Chemical Sensors for Environmental Monitoring and Foodstuffs Analysis

“…On the contrary, new approaches that enhance the useful response of piezoelectric balances and increase their resolution by modifying film coatings on a quartz plate or electrodes with gold nanoparticles [31], chitosan [32], or particles with magnetic properties [33] through the formation of biomimetic silica, peptide silaffin (silaffin peptides) [34], Teflon [18], or other polymers, etc., have been actively developed recently. In addition, there have been some studies on the properties of piezoelectric balance (quartz plate) resonant systems, which oscillate near resonant base frequencies and thus increase microweighing effectiveness [35], as well as publications on the development of effective electrical excitation circuits for quartz plates within the scope of improving their resolution [36].…”

Research Papers. An Approach to Design Broadband Air Backed Piezoelectric Sensor

“…Transducer performs the conversion of electrical energy into mechanical energy and vise verse (Ali et al, 2012). There is a fundamental relationship between the properties of the transducer and the quality of the resulting image; a several techniques have been developed for modelling transducer behaviour and hence predicting the required system response.…”