Effective Complex Permittivity of Random Composite Media: PVDF/(Na1/2Bi1/2)TiO3

Archana Kumar; Kamal Prasad

doi:10.4028/p-8k3qus

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HomeMaterials Science ForumMaterials Science Forum Vol. 1074Effective Complex Permittivity of Random Composite...

Effective Complex Permittivity of Random Composite Media: PVDF/(Na_1/2Bi_1/2)TiO₃

Abstract:

The present study discusses the fabrication of non-lead ceramic/polymer composites employing (Na_1/2Bi_1/2)TiO₃ (NBT) ceramic powder as a filler and poly(vinylidene fluoride); PVDF as a polymer matrix. The NBT (volume fraction, ϕ = 1) ceramics were synthesized using the conventional mixed-oxide method followed by the high-energy ball milling method whereas (1-ϕ)PVDF/ϕ(Na_1/2Bi_1/2)TiO₃; 0 ≤ ϕ ≤ 0.3 composites were prepared from a melt-mixing process. It was observed that the real and imaginary parts of dielectric permittivity, ac conductivity, and longitudinal piezoelectric charge coefficient increase with the increase in NBT-content. Different dielectric mixing models were presented to determine the effective complex permittivity of the composites. Five dielectric mixture equations have been chosen to test the acceptability of experimental data. It was revealed that theoretical models as given by Bruggman, Rother-Lichtenecker, and modified Rother-Lichtenecker show good agreement with the experimental results of filler-concentration dependent alteration of effective relative permittivity and loss factor of the PVDF/NBT composite. A mathematical model of first-order exponential growth has also been proposed, which fitted excellently the experimental data (r² > 0.998).

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Periodical:

Materials Science Forum (Volume 1074)

Pages:

47-52

DOI:

https://doi.org/10.4028/p-8k3qus

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Online since:

November 2022

Authors:

Archana Kumar, Kamal Prasad*

Keywords:

Composites, Dielectric, Dielectric Mixture Equations, Lead Free, Piezoelectric

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References

[1] A. Prasad, K. Prasad, Effective permittivity of random composite media: A comparative study, Phys. B: Conden. Matter 396 (2007) 132–137.

DOI: 10.1016/j.physb.2007.03.025

Google Scholar

[2] H. Ranjan, U.K. Mahto, K.P. Chandra, A.R. Kulkarni, A. Prasad, K. Prasad, Electrical and magnetic properties of 0-3 Ba(Fe1/2Nb1/2)O3/PVDF composites, J. Adv. Diel. 7 (2017) 1750036 (11 pages).

DOI: 10.1142/s2010135x17500369

Google Scholar

[3] K. Prasad, A. Prasad, K.P. Chandra, A.R. Kulkarni, Electrical conduction in 0-3 BaTiO3/PVDF composites, Integr. Ferroelectr. 117 (2010) 55-67.

DOI: 10.1080/10584587.2010.489425

Google Scholar

[4] Z. Ahmad, A. Prasad, K. Prasad, A comparative approach to predicting effective dielectric, piezoelectric and elastic properties of PZT/PVDF composites, Phys. B: Conden. Matter 404 (2009) 3637-3644.

DOI: 10.1016/j.physb.2009.06.009

Google Scholar

[5] Archana Kumar, K.P. Chandra, A. Prasad, K. Prasad, Effective complex permittivity of random composite media PVDF/0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O3: A comparative study, AIP Conf. Proc. 2220 (2020) 020091-4.

DOI: 10.1063/5.0002295

Google Scholar

[6] Subrato, A. Kumar, M.K. Paswan, K. Prasad, Effective dielectric properties of cement/ Ba0.06(Na0.5Bi0.5)0.94TiO3 composites: A comparative approach, IOP J. Phys.: Conf. Series 2070 (2021) 012240-6.

DOI: 10.1088/1742-6596/2070/1/012240

Google Scholar

[7] A. Kumar, A. Kumar, K. Prasad, Evaluation of (Na1/2Bi1/2)TiO3/PVDF piezocomposites for mechanical energy harvesting, Solid State Sci. 121 (2021) 106729 (8 pages).

DOI: 10.1016/j.solidstatesciences.2021.106729

Google Scholar