A.A. Teplykh – Ph. D. (Phys.-Math.), Senior Research Scientist, Laboratory of Physical Acoustics,  Saratov branch of Kotel'nikov IRE of RAS

E-mail: teplykhaa@mail.ru

B.D. Zaitsev – Dr. Sc. (Phys.-Math.), Professor, Head of Laboratory of Physical Acoustics, 

Saratov branch of Kotel'nikov IRE of RAS

E-mail: zai-boris@yandex.ru

A.M. Shikhabudinov – Ph. D. (Phys.-Math.), Senior Research Scientist, Laboratory of Physical Acoustics,  Saratov branch of Kotel'nikov IRE of RAS

E-mail: alex-sheih@yandex.ru

I.A. Borodina – Ph. D. (Phys.-Math.), Senior Research Scientist, Laboratory of Physical Acoustics,  Saratov branch of Kotel'nikov IRE of RAS

E-mail: borodinaia @yandex.ru

The method of refinement of the material constants for disk samples of CTS-19 piezoceramics using broadband acoustic spectroscopy technique is presented in this work. The vector electric impedance of each resonator was measured in a wide frequency range by means of the high-precision LCR measuring instrument. Then the theoretical model of the resonator using a 2-dimensional axisymmetric finite element method was created. With the help of this model, sensitivity analysis of various piezodisk oscillation modes was carried out, which allowed to clarify the values of some material constants of piezoceramics. At the final stage, the inverse problem was solved using the Nelder-Mead algorithm and the refined values of all 10 material constants of piezoceramics for each sample were calculated. Comparison of the refined values with ones which are earlier published in literature was carried out.

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