The role of Cr/Co substitution on dielectric properties of gadolinium orthochromite

Pecovska-Gjorgjevich, M.; Aleksovska, Slobotka; Dimitrovska-Lazova, Sandra; Marinšek, Marjan

doi:10.1088/0031-8949/91/4/045805

Cited by 14 publications

(4 citation statements)

References 47 publications

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“…The results indicate depressed semicircles with dispersed relaxation times and non-Debye behaviour. The complex permittivity plot ε′(ω) versus ε″(ω) is known to be significantly distorted at its low-frequency region for materials with high DC conductivity [33].…”

Section: Raman Spectroscopymentioning

confidence: 99%

Electrical characteristics of different concentration of silica nanoparticles embedded in epoxy resin

Al Soud,

Daradkeh,

Knápek

et al. 2023

Phys. Scr.

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To improve the electrical and mechanical properties of epoxy resin for their wide scope of applications, a modified epoxy nanocomposite was produced in this study by incorporating SiO2 nanoparticles of 15-30 nm in size.The electric properties of epoxy nanocomposite at room temperature at a frequency range of 10-2 – 107 Hz were examined. To determine the impact of nanoparticles on the epoxy composition, the epoxy composite was evaluated by scanning electron microscopy- energy dispersive X-ray spectroscopy, fourier transform infrared spectra, and raman spectra . The epoxy with 15 wt.% of SiO2 nanoparticles samples had a lower permittivity, loss number, conductivity, and capacitance than the unfilled epoxy. While it has a higher impedance and modulus than the unfilled epoxy. Accordingly, the effect of immobilized layers and the effect of the Lichtenecker-Rothe logarithmic mixing rule on the electrical and mechanical properties were clarified.

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Section: Raman Spectroscopymentioning

confidence: 99%

Electrical characteristics of different concentration of silica nanoparticles embedded in epoxy resin

Al Soud,

Daradkeh,

Knápek

et al. 2023

Phys. Scr.

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“…As the GFs concentration increased to 0.5 wt%, An increase in permittivity was observed, indicating that the grain boundaries began to touch and conductive pathways began to form. This phenomenon can be explained using percolation theory [27,39]. The dielectric permittivity of epoxy/GF microcomposite can be written as follows [27,39]:…”

Section: Permittivity and Tan(δ)mentioning

confidence: 99%

“…This phenomenon can be explained using percolation theory [27,39]. The dielectric permittivity of epoxy/GF microcomposite can be written as follows [27,39]:…”

Section: Permittivity and Tan(δ)mentioning

confidence: 99%

“…The findings in figure 8 reveal distorted semicircular patterns with dispersed relaxation times and non-Debye behaviour. In the complex permittivity plot (ε´(ω) versus ε″(ω)), it is observed that the low-frequency region is significantly affected for materials exhibiting high DC conductivity [39]. The semicircular shape corresponds to the bulk relaxation process and indicates the presence of a capacitive component.…”

Section: Cole-cole Plotmentioning

confidence: 99%

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Electrical properties of epoxy/graphite flakes microcomposite at the percolation threshold concentration

AlSoud,

Daradkeh,

Shaheen

et al. 2024

Phys. Scr.

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Epoxy/Graphite flakes (GFs) microcomposite with various GFs content (0.0625–1 wt.%), where the GFs sizes are between (100 nm to 10 µm), were studied for electrical properties using Novocontrol Alpha Analyser (10-2 Hz – 107 Hz). The analysis was performed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), visible spectrum reflectance spectra (VIS) spectra, and fourier transform infrared spectra (FTIR) spectroscopy. Increasing GFs content caused multiple changes in electrical characteristics. At 0.0625 wt.%, all electrical properties noticeably increased. But at 0.125 to 0.25 wt.%, immobilized nanolayers were formed leading to decreased permittivity, dielectric loss (tan(δ)), , quality factor (Q-factor), capacitance, conductivity, and figure of merit (F-factor). At 0.25 wt.%. the epoxy microcomposite had lower permittivity, tan(δ), conductivity, and capacitance compared with unfilled epoxy. With 0.5 wt.% of GFs, signified the percolation threshold, initiating a rise in permittivity, conductivity, capacitance, and tan(δ), accompanied by the closer proximity of grain boundaries, facilitating the formation of conductive channels. At a concentration of 1 wt.% GFs, the establishment of continuous interfacial conductive pathways resulted in a remarkable augmentation of all-dielectric properties. The Cole-Cole analysis has been employed to investigate variations in epoxy/GFs microcomposites based on concentration levels.

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Influence of Mn doping on dielectric properties, conduction mechanism and photocatalytic nature of gadolinium-based orthochromites

Qahtan

Husain

Somvanshi

et al. 2020

J Mater Sci: Mater Electron

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The role of Cr/Co substitution on dielectric properties of gadolinium orthochromite

Cited by 14 publications

References 47 publications

Electrical characteristics of different concentration of silica nanoparticles embedded in epoxy resin

Electrical characteristics of different concentration of silica nanoparticles embedded in epoxy resin

Electrical properties of epoxy/graphite flakes microcomposite at the percolation threshold concentration

Influence of Mn doping on dielectric properties, conduction mechanism and photocatalytic nature of gadolinium-based orthochromites

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