Evaluation of polarization of embedded piezoelectrics by the thermal wave method

This work demonstrates the benefit of the thermal wave method for the evaluation of the polarization state of embedded piezoelectrics. Two types of samples were investigated: A low-temperature co-fired ceramics (LTCC)/lead zirconate titanate (PZT) sensor-actuator and a macro-fiber composite (MFC) ac...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2012-09, Vol.59 (9), p.1950-1954
Main Authors: Suchaneck, G. S., Eydam, A., Wenguo Hu, Kranz, B. K., Drossel, Welf-Guntram, Gerlach, G.
Format: Article
Language:English
Subjects:
Actuators
Ceramics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Ferroelectric materials
Finite element methods
Frequency modulation
Heating
Lead zirconate titanates
Measurement by laser beam
Modulation
Physics
Piezoelectricity
Polarization
Pyroelectric and electrocaloric effects
Temperature measurement
Thermal conductivity
Thermal relaxation
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Summary:This work demonstrates the benefit of the thermal wave method for the evaluation of the polarization state of embedded piezoelectrics. Two types of samples were investigated: A low-temperature co-fired ceramics (LTCC)/lead zirconate titanate (PZT) sensor-actuator and a macro-fiber composite (MFC) actuator. At modulation frequencies below 10 Hz, the pyroelectric response was governed by thermal losses to the embedding layers. Here, the sample behavior was described by a harmonically heated piezoelectric plate exhibiting heat losses to the environment characterized by a single thermal relaxation time.
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2012.2412