Dispersion characteristics of complex electromechanical parameters of porous piezoceramics

In this paper, the results of experimental study of dispersion characteristics of complex electromechanical parameters of ferroelectrically “hard” porous piezoceramics based on PZT composition were presented. Experimental samples of porous piezoceramics were fabricated using a modified method of bur...

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Bibliographic Details
Published in:Journal of advanced dielectrics 2022-04, Vol.12 (2)
Main Authors: Shvetsov, I. A., Lugovaya, M. A., Konstantinova, M. G., Abramov, P. A., Petrova, E. I., Shvetsova, N. A., Rybyanets, A. N.
Format: Article
Language:English
Subjects:
Anomalies
Complex constants
complex electromechanical constants
Dispersion
Ferroelectricity
losses
microstructure
Parameters
Piezoelectric ceramics
Porous piezoceramics
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Summary:In this paper, the results of experimental study of dispersion characteristics of complex electromechanical parameters of ferroelectrically “hard” porous piezoceramics based on PZT composition were presented. Experimental samples of porous piezoceramics were fabricated using a modified method of burning-out a pore former. The complex constants of porous piezoceramics with relative porosity 16% and their frequency dependences were measured using the piezoelectric resonance analysis method. As a result of experimental studies, regions of elastic, piezoelectric and electromechanical dispersion, characterized by anomalies in the frequency dependences of the imaginary and real parts of the complex constants of porous piezoelectric ceramics were found. It was revealed also that the microstructural features of porous piezoceramics determine the character of frequency dependences of complex electromechanical parameters of porous piezoelectric ceramics. In conclusion, the microstructural and physical mechanisms of electromechanical losses and dispersion in porous piezoceramics were discussed.
ISSN:2010-135X
2010-1368
DOI:10.1142/S2010135X21600043