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Open AccessFeature PaperArticle

Revisiting the Characterization of the Losses in Piezoelectric Materials from Impedance Spectroscopy at Resonance

1
ETS Ingeniería y Sistemas de Telecomunicación, Campus Sur UPM, Madrid 28031, Spain
2
Instituto de Ciencia de Materiales de Madrid-CSIC, Madrid 28049, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Beatriz Noheda
Materials 2016, 9(2), 72; https://doi.org/10.3390/ma9020072
Received: 10 November 2015 / Revised: 22 December 2015 / Accepted: 19 January 2016 / Published: 26 January 2016
(This article belongs to the Special Issue Piezoelectric Materials)
Electronic devices using the piezoelectric effect contain piezoelectric materials: often crystals, but in many cases poled ferroelectric ceramics (piezoceramics), polymers or composites. On the one hand, these materials exhibit non-negligible losses, not only dielectric, but also mechanical and piezoelectric. In this work, we made simulations of the effect of the three types of losses in piezoelectric materials on the impedance spectrum at the resonance. We analyze independently each type of loss and show the differences among them. On the other hand, electrical and electronic engineers include piezoelectric sensors in electrical circuits to build devices and need electrical models of the sensor element. Frequently, material scientists and engineers use different languages, and the characteristic material coefficients do not have a straightforward translation to those specific electrical circuit components. To connect both fields of study, we propose the use of accurate methods of characterization from impedance measurements at electromechanical resonance that lead to determination of all types of losses, as an alternative to current standards. We introduce a simplified equivalent circuit model with electrical parameters that account for piezoceramic losses needed for the modeling and design of industrial applications. View Full-Text
Keywords: piezoelectric materials; ceramics; mechanical losses; dielectric losses; piezoelectric losses; electromechanical resonances; material characterization; impedance spectroscopy piezoelectric materials; ceramics; mechanical losses; dielectric losses; piezoelectric losses; electromechanical resonances; material characterization; impedance spectroscopy
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MDPI and ACS Style

González, A.M.; García, Á.; Benavente-Peces, C.; Pardo, L. Revisiting the Characterization of the Losses in Piezoelectric Materials from Impedance Spectroscopy at Resonance. Materials 2016, 9, 72.

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