Dielectric spectroscopy of PVA-Ni0.5Zn0.5Fe2O4polymer nanocomposite films

Taha, T.A.; Hassona, A.; El‐Rabaie, S.; Attia, M. T.

doi:10.1080/21870764.2020.1812839

Cited by 25 publications

(4 citation statements)

References 49 publications

(54 reference statements)

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“…The storage of electrical energy in dielectric materials expresses the real part of the dielectric constant (

ε_{1}

) and the imaginary part (

ε_{2}

) expresses the dielectric loss; the complex dielectric constant (

ε^{*}

) is determined as follows: 32–35

ε^{*} goodbreak= ε_{1} goodbreak- {normali ε}_{2}

Figure 5(a) shows the relationship between the real dielectric constant (

ε_{1}

) and the frequency at different percentages of cobalt oxide.…”

Section: Resultsmentioning

confidence: 99%

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Taha

Mahmoud

Hamdeh

2021

Polymer International

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The main objective of this research was to prepare high thermal and dielectric performance PVDF/PVP/Co3O4 nanocomposites (PVDF, oply(vinylidene fluoride); PVP, polyvinylpyrrolidone) using the method of solution mixing. The structural properties and thermal stability of the samples were examined through measurements of XRD, SEM, Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). From the XRD measurements, the cubic crystal structure of the Co3O4 nanoparticles was revealed with an average size of 17 nm. Also, diffraction peaks of the α‐phase were seen in PVDF/PVP/Co3O4 nanocomposite spectra. The SEM images for the surface of the films showed a homogeneous distribution of the nanoparticles. The absorption peaks of both α‐ and β‐phases were confirmed by measurements of the FTIR spectra. The nanocomposite films grafted with Co3O4 nanoparticles possess high thermal stability. The dielectric permittivity and energy density of the nanocomposites improved significantly at 4.0 wt% Co3O4. Finally, the increase in Co3O4 content caused an improvement in dielectric response function as well as electrical conductivity. © 2021 Society of Industrial Chemistry.

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“…The storage of electrical energy in dielectric materials expresses the real part of the dielectric constant (

ε_{1}

) and the imaginary part (

ε_{2}

) expresses the dielectric loss; the complex dielectric constant (

ε^{*}

) is determined as follows: 32–35

ε^{*} goodbreak= ε_{1} goodbreak- {normali ε}_{2}

Figure 5(a) shows the relationship between the real dielectric constant (

ε_{1}

) and the frequency at different percentages of cobalt oxide.…”

Section: Resultsmentioning

confidence: 99%

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Taha

Mahmoud

Hamdeh

2021

Polymer International

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“…The energy storage process is invariably accompanied by a dissipation of current, resulting in the loss of energy that is not stored but instead converted into heat within the material. The phenomenon of dielectric loss is indicated by the imaginary component of the dielectric constant [47,48].…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Facile design of a low-cost laser CUT-OFF filter with PMMA polymer nanocomposite doped with Mg_0.5Ni_0.5Fe₂O₄: structural, optical, and dielectric properties

Alzahrani,

Abulyazied,

Abomostafa

2024

Phys. Scr.

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This study employed the sol gel auto-combustion approach to synthesize Mg0.5Ni0.5Fe2O4 spinel ferrite nanoparticles. Additionally, the casting method was used to fabricate Mg0.5Ni0.5Fe2O4/PMMA nanocomposite polymer films. The structural properties were analyzed by the utilization of x-ray diffraction pattern (XRD), high resolution transmission electron microscope (HRTEM), and field emission scanning electron microscope (FESEM). The UV-visible spectrophotometer examination was used to evaluate the optical properties of the produced nanocomposite films, such as absorbance, transmittance, indirect energy band gap, Urbach energy, excitation coefficient, and refractive index. Two indirect optical energy gaps are calculated, whereas they decreased from 4.56 eV to 4.33 eV, and from 4.04 eV to 3.01 eV, while the Urbach energy increased from 0.304 eV to 0.524 eV as the nanofillers increased from 0 to 4 wt%. An investigation was conducted to examine the impact of nanoparticle doping on the dielectric constant, electric modulus, and ac conductivity. The Mg0.5Ni0.5Fe2O4/PMMA nanocomposite films demonstrate higher permittivity and ac conductivity and a lower dissipation factor and electric modulus compared to pure PMMA. The dielectric permittivity (ε′) increased from 2.76 to 3.43 at a constant frequency 100 Hz up to 2 wt.% of Mg0.5Ni0.5Fe2O4 then decreased to 2.41 while the dissipation factor tan(δ) decreased from 0.1 to 0.046 at the same frequency. The nanocomposite films are well-suited for utilization in CUT-OFF selective laser filters, solar cells, energy storage devices, and other applications in related industries.

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“…It is crucial to investigate how polymer blend NCPs respond to external electric fields as indicated in complex permittivity [48][49][50][51]:…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Preparation of lead hexaferrite filled PVA- PVP nanocomposite and a study of its structural features, optical and dielectric properties

Abomostafa¹,

Abouhaswa²,

Rabiea³

2023

Phys. Scr.

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Polymer blend films based on PVA-PVP filled with PbFe12O19 hexa-ferrites nanoparticles were created by solution casting technique. XRD, HRTEM, FESEM, FTIR, UV-Vis spectroscopy and Broad-band dielectric spectroscopy were used to examine the properties of the prepared polymer composite films. X-ray diffraction pattern of the powder confirmed the formation of PbFe12O19 with hexagonal phase and that for the films confirmed the incorporation of the PbFe12O19 nanoparticles in the PVA-PVP blends. HRTEM confirms the formation of hexagonal nanoparticles with average size ranged from 7 nm to 21 nm. Field emission scanning electron microscopy (FESEM) studied the morphology of the nanocomposite films. There are noticeable variations in FT-IR spectra that confirm the incorporation of PbFe12O19, NPs in PVA-PVP blend. The absorbance was found to increase with red shift in the ultraviolet-visible region while the transmittance decreases with increasing PbFe12O19, nanoparticles. By incorporating, PbFe12O19 the direct optical gap and indirect optical gap gradually decreased from 5.20 eV to 4.44 eV and 4.97 eV to 4.34 eV, respectively while the Urbach energy increases from 0.274 eV to 0.678 eV. According to the Wemple-Didomenico single oscillator model, the optical dispersion parameters have been examined and are found to be strongly affected by PbFe12O19, loading. Additionally, the nanocomposite film containing 7.5% PbFe12O19, demonstrated outstanding optical shielding. The complex dielectric constant (ε*), complex electric modulus (M*) and electrical conductivity, of NCPs materials have been studied with the frequency changing from 0.1 Hz to 10 MHz. The real permittivity (ε^') of PVA-PVP blend polymer film increased while the real electric modulus (M’) is found to decrease by the incorporation of PbFe12O19, nanoparticles up to 2.5 wt. % and the imaginary component of permittivity follows the same pattern of ε^'. The examined nanocomposite films show promise for flexible optoelectronics, photosensors, optical shielding and nano-dielectric materials.

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Dielectric spectroscopy of PVA-Ni_0.5Zn_0.5Fe₂O₄polymer nanocomposite films

Cited by 25 publications

References 49 publications

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Facile design of a low-cost laser CUT-OFF filter with PMMA polymer nanocomposite doped with Mg_0.5Ni_0.5Fe₂O₄: structural, optical, and dielectric properties

Preparation of lead hexaferrite filled PVA- PVP nanocomposite and a study of its structural features, optical and dielectric properties

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Dielectric spectroscopy of PVA-Ni0.5Zn0.5Fe2O4polymer nanocomposite films

Cited by 25 publications

References 49 publications

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co3O4 nanocomposites

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co3O4 nanocomposites

Facile design of a low-cost laser CUT-OFF filter with PMMA polymer nanocomposite doped with Mg0.5Ni0.5Fe2O4: structural, optical, and dielectric properties

Preparation of lead hexaferrite filled PVA- PVP nanocomposite and a study of its structural features, optical and dielectric properties

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Product

Resources

About

Dielectric spectroscopy of PVA-Ni_0.5Zn_0.5Fe₂O₄polymer nanocomposite films

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Facile design of a low-cost laser CUT-OFF filter with PMMA polymer nanocomposite doped with Mg_0.5Ni_0.5Fe₂O₄: structural, optical, and dielectric properties