In this work the attempt of refinement of the material constants for disk samples of CTS-19 piezoceramics using broadband acoustic spectroscopy method is made. 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. Using this model the inverse task was solved with help of an Nelder-Mead algorithm and the refined values of all 10 material constants of a piezoceramics for each sample are calculated. Comparison of the refined values with the values which are earlier published in literature is carried out.
$^1$Kotel’nikov Institute of Radio Engineering and Electronics of RAS, Saratov Branch
Science News of the Faculty of Physics, Lomonosov Moscow State University
This new information publication, which is intended to convey to the staff, students and graduate students, faculty colleagues and partners of the main achievements of scientists and scientific information on the events in the life of university physicists.