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Proceeding Paper

Study of Lead-Free Ferroelectric Composite Coatings by Impedance Spectroscopy †

1
Department of Microelectronics, Technical University of Sofia, 1756 Sofia, Bulgaria
2
Department of Electronics, Technical University of Sofia, 1756 Sofia, Bulgaria
*
Author to whom correspondence should be addressed.
Presented at the 2nd Coatings and Interfaces Web Conference, 15–31 May 2020; Available online: https://ciwc2020.sciforum.net/.
Mater. Proc. 2020, 2(1), 11; https://doi.org/10.3390/CIWC2020-06812
Published: 7 May 2020
(This article belongs to the Proceedings of 2nd Coatings and Interfaces Web Conference (CIWC-2 2020))
Abstract: The aim of the study is the preparation and electrical characterization of lead-free ferroelectric oxide BaSrTiO3 in the composition with a piezoelectric polymer. The properties of the deposited films were compared with pristine oxide. Atomic force microscopy showed a smooth surface, and a regular and homogeneous distribution of particles of both components in the composite films. The dielectric properties (electric permittivity and dielectric loss) were investigated at different temperatures ranging from 5 to 130 °C. Impedance spectroscopy was applied in the frequency range 100–100 kHz. The dielectric constant increase with the addition of a piezoelectric polymer to the ceramic phase was demonstrated. It can be seen that the interface conditions at the electrodes are improved after inserting a piezoelectric polymer. The interpretation of the plots of the complex impedance vs. frequency, and the real part of the impedance vs. the imaginary part, give information about the polarization process revealed in the structures.
Keywords: ferroelectric composite; piezoelectric polymer; impedance spectroscopy; dielectric properties; polarization processes ferroelectric composite; piezoelectric polymer; impedance spectroscopy; dielectric properties; polarization processes
MDPI and ACS Style

Aleksandrova, M.; Pandiev, I.; Tsanev, T.; Dobrikov, G. Study of Lead-Free Ferroelectric Composite Coatings by Impedance Spectroscopy. Mater. Proc. 2020, 2, 11. https://doi.org/10.3390/CIWC2020-06812

AMA Style

Aleksandrova M, Pandiev I, Tsanev T, Dobrikov G. Study of Lead-Free Ferroelectric Composite Coatings by Impedance Spectroscopy. Materials Proceedings. 2020; 2(1):11. https://doi.org/10.3390/CIWC2020-06812

Chicago/Turabian Style

Aleksandrova, Mariya, Ivailo Pandiev, Tsvetozar Tsanev, and Georgi Dobrikov. 2020. "Study of Lead-Free Ferroelectric Composite Coatings by Impedance Spectroscopy" Materials Proceedings 2, no. 1: 11. https://doi.org/10.3390/CIWC2020-06812

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