Articles | Volume 5, issue 1
J. Sens. Sens. Syst., 5, 165–170, 2016
https://doi.org/10.5194/jsss-5-165-2016

Special issue: Sensor/IRS2 2015

J. Sens. Sens. Syst., 5, 165–170, 2016
https://doi.org/10.5194/jsss-5-165-2016

Regular research article 10 May 2016

Regular research article | 10 May 2016

Characterisation of the polarisation state of embedded piezoelectric transducers by thermal waves and thermal pulses

Agnes Eydam, Gunnar Suchaneck, and Gerald Gerlach Agnes Eydam et al.
  • Solid State Electronics Laboratory, Technische Universität Dresden, Dresden, Germany

Abstract. In this work, we apply the thermal wave method and the thermal pulse method for non-destructive characterisation of the polarisation state of embedded piezoelectric transducers. Heating the sample with a square-wave modulated laser beam or a single laser pulse leads to a pyroelectric current recorded in the frequency or time domain, respectively. It carries information about the polarisation state. Analytical and numerical finite element models describe the pyroelectric response of the piezoceramic. Modelling and experimental results are compared for a simple lead–zirconate–titanate (PZT) plate, a low-temperature co-fired ceramics (LTCC)/PZT sensor and actuator, and a macro-fibre composite (MFC) actuator.

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Short summary
Piezoelectric devices are characterized non-destructively to ensure their functionality. The material is heated by laser diodes. The resulting temperature changes lead to a pyroelectric current. Analytical and numerical finite element models describe the temperature distribution and the current in frequency and time domain. Modelling and experimental results are compared for piezoelectric plates and integrated sensors and actuators.
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