Analysis of the Methods of Determination of the Viscoelastic Coefficients of Piezoceramic Resonators

Resumo

We analyze the well-known and new methods for the experimental determination of the viscoelastic coefficients of piezoceramic resonators including the coefficients of coupling and the tangents of mechanical and piezoelectric losses. The foundations of author’s new computation-experimental technique are outlined and the examples of its application are presented. The method is justified by using, as an example, the well-known problem of radial vibrations of a thin disk with continuous electrodes. The idea of alternating measurements of voltage drops in a modernized Mason circuit is developed. On its basis, we develop a new method for the determination of phase shifts between the components of admittance by the cosine theorem and present some elements of this technique. The experimental data are in good agreement with the numerical results.