Title :
Evaluation of polarization of embedded piezoelectrics by the thermal wave method
Author :
Suchaneck, Gunnar ; Eydam, Agnes ; Hu, Wenguo ; Kranz, Burkhart ; Drossel, Welf-Guntram ; Gerlach, Gerald
Author_Institution :
Solid State Electron. Lab., Tech. Univ. Dresden, Dresden, Germany
fDate :
9/1/2012 12:00:00 AM
Abstract :
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.
Keywords :
dielectric polarisation; lead compounds; piezoceramics; pyroelectricity; MFC actuator; PZT; embedded piezoelectric polarization; embedding layer; lead zirconate titanate; low temperature cofired ceramic; macrofiber composite; pyroelectric response; sensor-actuator; thermal loss; thermal relaxation time; thermal wave method; Actuators; Finite element methods; Frequency modulation; Heating; Measurement by laser beam; Temperature measurement; Thermal conductivity;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2012.2412
