• English
  • Deutsch
  • Log In
    or
  • Research Outputs
  • Projects
  • Researchers
  • Institutes
  • Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Konferenzschrift
  4. Evaluation of the polarization state of integrated piezoelectric modules using the thermal wave method
 
  • Details
  • Full
Options
2013
Conference Paper
Titel

Evaluation of the polarization state of integrated piezoelectric modules using the thermal wave method

Abstract
In this work, we demonstrate that the thermal wave method is a promising approach for nondestructive evaluation of the polarization state of embedded piezoelectrics in integrated sensor-actuator modules. Embedded Pb(Zr,Ti)O3 (PZT) plates and fibres are subjected to periodic heating by a square wave-modulated laser array through the corresponding top layers. At low modulation frequencies, the pyroelectric response of PZT is governed by thermal losses to the embedding layers. Here, the sample behavior can be described by a harmonically heated piezoelectric plate exhibiting heat losses to the environment characterized by a continuous distribution of relaxation times. A transient thermal analysis was performed using the finite element modeling package ANSYS. Modulation frequencies for particu lar penetration depth were determined for die-casted piezoelectric modules. The average pyroelectric coefficient of piezofiber composites was measured and their thermal diffusivity was estimated by means of the frequency dependence of the pyroelectric coefficient.
Author(s)
Eydam, A.
Suchaneck, G.
Hohlfeld, K.
Gebhardt, S.
Rübner, M.
Schwankl, M.
Michaelis, A.
Singer, R.F.
Körner, C.
Gerlach, G.
Hauptwerk
4th Scientific Symposium "Lightweight Design by Integrating Functions" 2013. Proceedings
Konferenz
Scientific Symposium "Lightweight Design by Integrating Functions" 2013
Thumbnail Image
Language
English
google-scholar
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Send Feedback
© 2022