Experimental determination of the complete set of constants of polarized piezoceramics on a single ring-shaped sample

Abstract

Variants of the practical application of the method developed in [1] for determining the complete set of piezoceramic constants on a single ring-shaped sample are considered. Using a virtual machine experiment conducted on the ANSYS finite element modeling software package, a complete set of constants was calculated for PZT4 piezoceramics. To increase the information content, the frequency of the second overtone of the ring radial vibrations was measured taking into account its thickness. The error in determining the constants did not exceed 1%. The influence of the quality factor on the determination of the constants of piezoceramics is studied. It is shown that when using formulas for calculating the constants of piezoceramics, regardless of the quality factory values, it is necessary to determine the resonance frequencies from the maximum of active conductivity. For PKP-12 piezoceramics, experimental studies were carried out and the values of the piezoceramic moduli were calculated by the resonance – antiresonance method for piezoelectric elements of three sizes, as well as by the developed method for one sample in the form of a ring. A good agreement was obtained between the results found by different methods. The thickness resonance is investigated, a technique for its measurement is developed.