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Highly enhanced frequency- and temperature-stability permittivity of three-phase poly(vinylidene-fluoride) nanocomposites with retaining low loss tangent and high permittivity
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Metadata
Document Title
Highly enhanced frequency- and temperature-stability permittivity of three-phase poly(vinylidene-fluoride) nanocomposites with retaining low loss tangent and high permittivity
Author
Silakaew K., Chanlek N., Manyam J., Thongbai P.
Name from Authors Collection
Affiliations
Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand; Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Muang, Nakhon Ratchasima 30000, Thailand; National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, 12120, Thailand; Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand; Institute of Nanomaterials Research and Innovation for Energy (IN–RIE), NANOTEC–KKU RNN on Nanomaterials Research and Innovation for Energy, Khon Kaen University, Khon Kaen, 40002, Thailand
Type
Article
Source Title
Results in Physics
ISSN
22113797
Year
2021
Volume
26
Open Access
Gold
Publisher
Elsevier B.V.
DOI
10.1016/j.rinp.2021.104410
Abstract
Although ceramic/polymer composites have been of great interest as embedded capacitor materials, the composites have a low dielectric permittivity (ε′ ≪ 100) and very large dissipation factor (tanδ ≫ 0.1). In this work, the hybrid particles of silver nanoparticles deposited on BaTiO3 nanoparticles (nAg-nBT) have been used as a filler to enhance the ε′ response in a poly(vinylidene-fluoride) (PVDF) polymer with retaining low tanδ. Residual isolated particles of nAg (i-nAg) and nBT (i-nBT) are the key factors for enhancing the dielectric properties. Significantly increased ε′ ~ 247 (at 103 Hz) with tanδ ~ 0.038 is obtained. The ε′ value is slightly dependent on frequency and temperature over wide ranges. A linear increase in ε′ of the composites at low volume fractions of filler (fAg+nBT < 0.29) is caused by a high ε′ value of nBT particles. An abrupt change in ε′ is observed in the composites at fnAg+nBT > 0.29, which is attributed to a shorten interparticle distance between filler particles, giving rise to strong interfacial polarization. The dielectric behavior can be well described by the effective medium percolation theory (EMPT) model. The discrete deposition of nAg observed in the nAg-nBT and uniform distribution of i-nAg in the PVDF matrix, which is dispersed by nAg-nBT and i-nBT particles, can effectively prevent the formation of the conduction pathways. The obtained low tanδ over the temperature range of 30-140 °C is explained by these two reasons. This research provides a new important concept for the material development of dielectric polymer matrix composites. © 2021 The Author(s)
Keyword
Dielectric properties | EMPT | Hybrid particles | Percolation | Polymer composites | PVDF
Funding Sponsor
Khon Kaen University; National Science and Technology Development Agency; Thailand Research Fund; National Nanotechnology Center; Ministry of Higher Education, Science, Research and Innovation, Thailand
License
CC BY or CC BY-NC-ND
Rights
Author
Publication Source
Scopus