Dielectric and piezoelectric properties of modified lead-free NaNbO3–KNbO3/PVDF composite ceramics

This work presents the results of study of the electrophysical properties of composite polymer ceramics (1 − x)[KNN-LTSN]–xPVDF at x = 25 vol.% and x= 50 vol.% in the temperature range of T = 20–160∘C and frequency range of f = 2 × 101–2 × 106 Hz. The concentration dependence of piezomodules of the...

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Autores principales:	Y. I. Yurasov, M. I. Tolstunov, A. V. Nazarenko, A. A. Pavelko, A. V. Yudin, I. A. Verbenko, L. A. Reznitchenko
Formato:	article
Lenguaje:	EN
Publicado:	World Scientific Publishing 2021
Materias:	composites pvdf knn ferroelectrics relaxation havriliak–negami model complex conductivity Electricity QC501-721
Acceso en línea:	https://doaj.org/article/920c7597ccd346f48689ad87c3d57c47
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spelling	oai:doaj.org-article:920c7597ccd346f48689ad87c3d57c472021-11-11T04:02:23ZDielectric and piezoelectric properties of modified lead-free NaNbO3–KNbO3/PVDF composite ceramics2010-135X2010-136810.1142/S2010135X21600158https://doaj.org/article/920c7597ccd346f48689ad87c3d57c472021-10-01T00:00:00Zhttp://www.worldscientific.com/doi/epdf/10.1142/S2010135X21600158https://doaj.org/toc/2010-135Xhttps://doaj.org/toc/2010-1368This work presents the results of study of the electrophysical properties of composite polymer ceramics (1 − x)[KNN-LTSN]–xPVDF at x = 25 vol.% and x= 50 vol.% in the temperature range of T = 20–160∘C and frequency range of f = 2 × 101–2 × 106 Hz. The concentration dependence of piezomodules of the studied materials has been analyzed as a function of temperature. X-ray measurements have also been carried out. A model of description of revealed dielectric parameters dispersion in the material is presented. The nonclassical modified Havriliak–Negami model written for complex electrical conductivity has been used to describe the temperature–frequency properties. It is shown that the dielectric spectra of the studied composites include three relaxation processes in the temperature ranges of 40–80∘C, 80–120∘C and 120–150 ∘C, which were confirmed by the dynamics of changes in the dependences of γ′(f), tgδ(f), M′(f), M′′(f) and M′′(M′). All three processes are almost exactly described by this model and well correlated with the studies by other researchers of the composites based on PVDF. The results of this work show that the use of such experimental model is suitable for describing the complex dielectric spectra of any nonlinear dielectrics including composite materials.Y. I. YurasovM. I. TolstunovA. V. NazarenkoA. A. PavelkoA. V. YudinI. A. VerbenkoL. A. ReznitchenkoWorld Scientific Publishingarticlecompositespvdfknnferroelectricsrelaxationhavriliak–negami modelcomplex conductivityElectricityQC501-721ENJournal of Advanced Dielectrics, Vol 11, Iss 5, Pp 2160015-1-2160015-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	composites pvdf knn ferroelectrics relaxation havriliak–negami model complex conductivity Electricity QC501-721
spellingShingle	composites pvdf knn ferroelectrics relaxation havriliak–negami model complex conductivity Electricity QC501-721 Y. I. Yurasov M. I. Tolstunov A. V. Nazarenko A. A. Pavelko A. V. Yudin I. A. Verbenko L. A. Reznitchenko Dielectric and piezoelectric properties of modified lead-free NaNbO3–KNbO3/PVDF composite ceramics
description	This work presents the results of study of the electrophysical properties of composite polymer ceramics (1 − x)[KNN-LTSN]–xPVDF at x = 25 vol.% and x= 50 vol.% in the temperature range of T = 20–160∘C and frequency range of f = 2 × 101–2 × 106 Hz. The concentration dependence of piezomodules of the studied materials has been analyzed as a function of temperature. X-ray measurements have also been carried out. A model of description of revealed dielectric parameters dispersion in the material is presented. The nonclassical modified Havriliak–Negami model written for complex electrical conductivity has been used to describe the temperature–frequency properties. It is shown that the dielectric spectra of the studied composites include three relaxation processes in the temperature ranges of 40–80∘C, 80–120∘C and 120–150 ∘C, which were confirmed by the dynamics of changes in the dependences of γ′(f), tgδ(f), M′(f), M′′(f) and M′′(M′). All three processes are almost exactly described by this model and well correlated with the studies by other researchers of the composites based on PVDF. The results of this work show that the use of such experimental model is suitable for describing the complex dielectric spectra of any nonlinear dielectrics including composite materials.
format	article
author	Y. I. Yurasov M. I. Tolstunov A. V. Nazarenko A. A. Pavelko A. V. Yudin I. A. Verbenko L. A. Reznitchenko
author_facet	Y. I. Yurasov M. I. Tolstunov A. V. Nazarenko A. A. Pavelko A. V. Yudin I. A. Verbenko L. A. Reznitchenko
author_sort	Y. I. Yurasov
title	Dielectric and piezoelectric properties of modified lead-free NaNbO3–KNbO3/PVDF composite ceramics
title_short	Dielectric and piezoelectric properties of modified lead-free NaNbO3–KNbO3/PVDF composite ceramics
title_full	Dielectric and piezoelectric properties of modified lead-free NaNbO3–KNbO3/PVDF composite ceramics
title_fullStr	Dielectric and piezoelectric properties of modified lead-free NaNbO3–KNbO3/PVDF composite ceramics
title_full_unstemmed	Dielectric and piezoelectric properties of modified lead-free NaNbO3–KNbO3/PVDF composite ceramics
title_sort	dielectric and piezoelectric properties of modified lead-free nanbo3–knbo3/pvdf composite ceramics
publisher	World Scientific Publishing
publishDate	2021
url	https://doaj.org/article/920c7597ccd346f48689ad87c3d57c47
work_keys_str_mv	AT yiyurasov dielectricandpiezoelectricpropertiesofmodifiedleadfreenanbo3knbo3pvdfcompositeceramics AT mitolstunov dielectricandpiezoelectricpropertiesofmodifiedleadfreenanbo3knbo3pvdfcompositeceramics AT avnazarenko dielectricandpiezoelectricpropertiesofmodifiedleadfreenanbo3knbo3pvdfcompositeceramics AT aapavelko dielectricandpiezoelectricpropertiesofmodifiedleadfreenanbo3knbo3pvdfcompositeceramics AT avyudin dielectricandpiezoelectricpropertiesofmodifiedleadfreenanbo3knbo3pvdfcompositeceramics AT iaverbenko dielectricandpiezoelectricpropertiesofmodifiedleadfreenanbo3knbo3pvdfcompositeceramics AT lareznitchenko dielectricandpiezoelectricpropertiesofmodifiedleadfreenanbo3knbo3pvdfcompositeceramics
_version_	1718439604978188288

Dielectric and piezoelectric properties of modified lead-free NaNbO3–KNbO3/PVDF composite ceramics

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