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Magnetodielectric Response of Soft Magnetoactive Elastomers: Effects of Filler Concentration and Measurement Frequency

The magnetodielectric response of magnetoactive elastomers (MAEs) in its dependence on filler concentration, magnetic field, and test frequency is studied experimentally. MAEs are synthesized on the basis of a silicone matrix filled with spherical carbonyl iron particles characterized by a mean diam...

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Detalles Bibliográficos
Autores principales: Kostrov, Sergei A., Shamonin, Mikhail, Stepanov, Gennady V., Kramarenko, Elena Yu.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539772/
https://www.ncbi.nlm.nih.gov/pubmed/31067642
http://dx.doi.org/10.3390/ijms20092230
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author Kostrov, Sergei A.
Shamonin, Mikhail
Stepanov, Gennady V.
Kramarenko, Elena Yu.
author_facet Kostrov, Sergei A.
Shamonin, Mikhail
Stepanov, Gennady V.
Kramarenko, Elena Yu.
author_sort Kostrov, Sergei A.
collection PubMed
description The magnetodielectric response of magnetoactive elastomers (MAEs) in its dependence on filler concentration, magnetic field, and test frequency is studied experimentally. MAEs are synthesized on the basis of a silicone matrix filled with spherical carbonyl iron particles characterized by a mean diameter of 4.5 µm. The concentration of the magnetic filler within composite materials is equal to 70, 75, and 80 mass%. The effective lossless permittivity ε′ as well as the dielectric loss tanδ grow significantly when the magnetic field increases. The permittivity increases and the dielectric loss decreases with increasing filler concentration. In the measurement frequency range between 1 kHz and 200 kHz, the frequency hardly affects the values of ε′ and tanδ in the absence of a magnetic field. However, both parameters decrease considerably with the growing frequency in a constant magnetic field. The more strongly the magnetic field is applied, the larger the change in permittivity and loss tangent at the same test frequency is observed. An equivalent circuit formulation qualitatively describes the main tendencies of the magnetodielectric response.
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spelling pubmed-65397722019-06-04 Magnetodielectric Response of Soft Magnetoactive Elastomers: Effects of Filler Concentration and Measurement Frequency Kostrov, Sergei A. Shamonin, Mikhail Stepanov, Gennady V. Kramarenko, Elena Yu. Int J Mol Sci Article The magnetodielectric response of magnetoactive elastomers (MAEs) in its dependence on filler concentration, magnetic field, and test frequency is studied experimentally. MAEs are synthesized on the basis of a silicone matrix filled with spherical carbonyl iron particles characterized by a mean diameter of 4.5 µm. The concentration of the magnetic filler within composite materials is equal to 70, 75, and 80 mass%. The effective lossless permittivity ε′ as well as the dielectric loss tanδ grow significantly when the magnetic field increases. The permittivity increases and the dielectric loss decreases with increasing filler concentration. In the measurement frequency range between 1 kHz and 200 kHz, the frequency hardly affects the values of ε′ and tanδ in the absence of a magnetic field. However, both parameters decrease considerably with the growing frequency in a constant magnetic field. The more strongly the magnetic field is applied, the larger the change in permittivity and loss tangent at the same test frequency is observed. An equivalent circuit formulation qualitatively describes the main tendencies of the magnetodielectric response. MDPI 2019-05-07 /pmc/articles/PMC6539772/ /pubmed/31067642 http://dx.doi.org/10.3390/ijms20092230 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kostrov, Sergei A.
Shamonin, Mikhail
Stepanov, Gennady V.
Kramarenko, Elena Yu.
Magnetodielectric Response of Soft Magnetoactive Elastomers: Effects of Filler Concentration and Measurement Frequency
title Magnetodielectric Response of Soft Magnetoactive Elastomers: Effects of Filler Concentration and Measurement Frequency
title_full Magnetodielectric Response of Soft Magnetoactive Elastomers: Effects of Filler Concentration and Measurement Frequency
title_fullStr Magnetodielectric Response of Soft Magnetoactive Elastomers: Effects of Filler Concentration and Measurement Frequency
title_full_unstemmed Magnetodielectric Response of Soft Magnetoactive Elastomers: Effects of Filler Concentration and Measurement Frequency
title_short Magnetodielectric Response of Soft Magnetoactive Elastomers: Effects of Filler Concentration and Measurement Frequency
title_sort magnetodielectric response of soft magnetoactive elastomers: effects of filler concentration and measurement frequency
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539772/
https://www.ncbi.nlm.nih.gov/pubmed/31067642
http://dx.doi.org/10.3390/ijms20092230
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