Manganese ferrite-polyaniline hybrid materials: Electrical and magnetic properties

Stoia, Marcela; Păcurariu, Cornelia; Míhali, Ciprian; Mălăescu, I.; Marin, C.N.; Căpraru, Aylin

doi:10.1016/j.ceramint.2018.09.109

Cited by 14 publications

(4 citation statements)

References 29 publications

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“…This model expects that at low frequency the conductivity will be nearly constant while at high frequency the conductivity is increased. The dependence of the σac on frequency is causing a hopping of the charge carriers through localized states, because the excitation of the charge carriers to the highest states in the conduction band [98,99]. We observed that the conductivity is increased with the presence of the MWCNTs to the NiFe2O4 and the CoFe2O4, due to the formation of vacancies at hydroxylic and carbonyls groups in the nanocomposites [100].…”

Section: Ac Conductivity Behaviormentioning

confidence: 76%

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Hezam

Rajeh

Nur

et al. 2020

Physica B: Condensed Matter

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Section: Ac Conductivity Behaviormentioning

confidence: 76%

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Hezam

Rajeh

Nur

et al. 2020

Physica B: Condensed Matter

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“…The diameter of semicircle decreases with the increase the volume fractions x of Al particles, which determines an increase of the σ DC electrical conductivity. The existence of a single semicircle for all volume fractions x of Al particles shows that the electrical process in the samples is characterized by a single relaxation mechanism, being correlated with the microstructure of the sample when it is modeled in terms of equivalent electrical circuit [ 27 , 28 ]. The experimental data of the Nyquist plots, Z″(Z′) from Figure 5 b, for the investigated samples were fitted with a theoretical dependence, Z″(Z′), and the best fit of these plots was given by an electrical model, presented in the inset of Figure 5 b.…”

Section: Resultsmentioning

confidence: 99%

Electric and Dielectric Properties in Low-Frequency Fields of Composites Consisting of Silicone Rubber and Al Particles for Flexible Electronic Devices

et al. 2022

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Understanding the electrical conduction and dielectric polarization properties of elastomer-based composites is important for the design of flexible and elastic electronic devices and circuits. Five samples were manufactured by mixing silicone rubber (RTV-530) with Al particles in different volume fractions, x equal to 0%, 0.5%, 1%, 2.5% and 5.1%. Using the complex impedance measurements, the electric modulus, M, the electrical conductivity, σ, and the dielectric permittivity, ε, over the frequency range 100 Hz–200 kHz were analyzed. The electrical conductivity spectrum, σ(f), follows the Jonscher universal law and the DC conductivity of the samples, σDC, increases from 2.637·10−8 S/m to 5.725·10−8 S/m, with increasing x from, 0 to 5.1%. The conduction process was analyzed in terms of Mott’s variable-range-hopping (VRH) model. The hopping distance of the charge carriers, Rh decreases with increasing x, from 7.30 nm (for x = 0) to 5.92 nm (for x = 5.1%). The frequency dependence of permittivity, ε(f) = ε′(f) − iε″(f), reveals a relaxation process with the maximum of ε″(f) shifting from 301 Hz to 385 Hz and values of ε′(f) increasing with the increase of x.

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“…Very low diffraction peaks are observed on further addition of NZF nanoparticles above 30 wt % into the PANI system (PANI-30% NZF, PANI-40% NZF, and PANI-50% NZF) due to the presence of the amorphous phase. 25,44 It is clearly seen that in PANI-50% NZF nanocomposites the NZF nanoparticles fully suppress the diffraction peaks. The (311) peak of NZF is found in all the PANI-NZF composites, and it is periodically parallel.…”

Section: Synthesis Of Pani-nzf Nanocompositesmentioning

confidence: 98%

Enhanced gas-sensing performance at room temperature and electrical properties of polyaniline–Ni_0.6Zn_0.4Fe₂O₄ nanocomposites

Prasanna

Nagaraju³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this work, polyaniline–nickel–zinc–ferrite nanocomposites were synthesized by the in situ polymerization method by varying the concentrations of Ni0.6Z0.4Fe2O4 nanoparticles in the polyaniline matrix (10, 20, 30, 40, and 50 wt%). The synthesized nanocomposites were subjected to structural characterizations viz., X-ray diffraction, Fourier-transform infrared spectroscopy, and field-emission scanning electron microscopy techniques. Fourier-transform infrared spectroscopy and X-ray diffraction spectral studies reveal the presence of characteristic bands of both polyaniline and Ni0.6Z0.4Fe2O4 nanoparticles and the formation of their composites is confirmed with the interfacial interaction of Ni0.6Z0.4Fe2O4 nanoparticles in the polyaniline systems. The field-emission scanning electron microscopy images of polyaniline–Ni0.6Z0.4Fe2O4 nanocomposites show a symmetric morphological variation of Ni0.6Z0.4Fe2O4 nanoparticles compared to polyaniline. The electrical properties of the prepared samples were studied in the frequency range of 100 Hz–5 MHz at room temperature. The gas-sensing performance of the nanocomposites was studied at room temperature for butane gas. The polyaniline–10 wt% Ni0.6Z0.4Fe2O4 nanocomposite shows maximum sensing response (109%) at room temperature for 5000 ppm of butane gas with a good response of 28 s and recovery time of 31 s. The stability of the prepared sample was tested for 60 days.

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Manganese ferrite-polyaniline hybrid materials: Electrical and magnetic properties

Cited by 14 publications

References 29 publications

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Electric and Dielectric Properties in Low-Frequency Fields of Composites Consisting of Silicone Rubber and Al Particles for Flexible Electronic Devices

Enhanced gas-sensing performance at room temperature and electrical properties of polyaniline–Ni_0.6Zn_0.4Fe₂O₄ nanocomposites

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Manganese ferrite-polyaniline hybrid materials: Electrical and magnetic properties

Cited by 14 publications

References 29 publications

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Synthesis and physical properties of spinel ferrites/MWCNTs hybrids nanocomposites for energy storage and photocatalytic applications

Electric and Dielectric Properties in Low-Frequency Fields of Composites Consisting of Silicone Rubber and Al Particles for Flexible Electronic Devices

Enhanced gas-sensing performance at room temperature and electrical properties of polyaniline–Ni0.6Zn0.4Fe2O4 nanocomposites

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Product

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Enhanced gas-sensing performance at room temperature and electrical properties of polyaniline–Ni_0.6Zn_0.4Fe₂O₄ nanocomposites