Significantly Improved Surface Flashover Characteristics of Epoxy Resin/Al2O3 Nanocomposites in Air, Vacuum and SF6 by Gas-Phase Fluorination

Khan, Muhammad Zeeshan; Waleed, Aashir; Khan, Asim Ali; Hassan, Muhammad Arshad Shehzad; Paracha, Zahir Javed; Farooq, Umar

doi:10.1007/s11664-020-08001-4

Cited by 19 publications

(4 citation statements)

References 25 publications

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“…Roughening and fluorination of spacer not only increase the lifting voltage of the linear particles, but also weaken the motion range of the linear particles. It has already been verified that both methods increase the flashover voltage of spacers [14,15,27,29]. So considering the findings in this work, we believe that roughening and fluorination could be effective approaches to increase the stability of spacers.…”

Section: Discussionsupporting

confidence: 64%

Significantly suppressing metal particle-induced surface charge accumulation of spacers in DC gas-insulated power transmission lines

Xing

Sun²,

Jiang³

et al. 2022

J. Phys. D: Appl. Phys.

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In this letter, we report functions of surface roughening and fluorination on suppressing linear metal particle-induced spacer surface charge accumulation. An appropriate increase in spacer surface conductivity by short-term fluorination and roughening not only increases the metal particle lifting voltage, but also weakens the particle activation. The spacer surface charge shows reduced charge density in roughened spacer, while fluorination modification significantly suppresses the charge density on the spacer surface. For roughened and fluorinated samples, the decrease of surface charge density and the intrinsic lower electric field (due to an increase in conductivity) near the triple junction both contribute to a higher particle lifting voltage. The content in this letter provides an approach to effectively suppress the charge accumulation induced by linear metal particles.

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Section: Discussionsupporting

confidence: 64%

Significantly suppressing metal particle-induced surface charge accumulation of spacers in DC gas-insulated power transmission lines

Xing

Sun²,

Jiang³

et al. 2022

J. Phys. D: Appl. Phys.

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“…It can be seen from Figure b that new EP characteristic absorption peaks appear after mixing M-BNNSs or 10 wt % BNNS with EP. The bands at 3421, 2830–3000, 1608, 1509, 1035, and 912 cm –1 correspond to the stretching vibration of −OH, the stretching vibration of C–H and C–H 2 , the absorption peak of CC on the benzene ring, the stretching vibration peak of benzene ring, C–O stretching vibration of ester bond, and the characteristic absorption peak of epoxy group, respectively. ,− The position of the two characteristic peaks of BNNS did not change after compounding EP, but the intensity enhanced with the increase of M-BNNS content.…”

Section: Resultsmentioning

confidence: 99%

Thermally Conductive Anticorrosive Epoxy Nanocomposites with Tannic Acid-Modified Boron Nitride Nanosheets

Pan

Zhang

Yang

et al. 2020

Ind. Eng. Chem. Res.

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Boron nitride nanosheets (BNNSs) were synthesized by the classical chemical vapor deposition (CVD) method and modified by tannic acid (TA) (named as M-BNNSs). M-BNNSs have greatly improved the thermal conductivity (0.45 W/(m·K)) and mechanical tensile strength (15.10 MPa) of epoxy resin (EP). More importantly, the EP composite coating with an appropriate amount of M-BNNS not only has an excellent anticorrosion effect (the I corr of 10%M-BNNS@EP is 8.053 × 10–7 A/cm2 after immersed in 3.5 wt % NaCl solution for 30 min) on the metal substrates but also has a good anticorrosion stability. The impedance modulus (|Z|0.01) of the 10%M-BNNS@EP coating is higher than that of the neat EP coating and other composite coating systems during 120 h of immersion. Polarization curve (Tafel) and electrochemical impedance spectroscopy (EIS) tests reveal that the 10%M-BNNS@EP coating not only has an excellent anticorrosion effect on the metal substrates but also has a good anticorrosion stability after being immersed in 3.5 wt % NaCl aqueous solution for 120 h.

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“…The even distribution of the filler within the polymer matrix is a fundamental challenge in sample preparation. Previous literature has presented different methods for sample preparation [8,[16][17][18]. However, we have chosen the method that we believe to be the most suitable, ensuring the effective dispersion of the microfiller within the epoxy.…”

Section: Sample Preparationmentioning

confidence: 99%

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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Significantly Improved Surface Flashover Characteristics of Epoxy Resin/Al2O3 Nanocomposites in Air, Vacuum and SF6 by Gas-Phase Fluorination

Cited by 19 publications

References 25 publications

Significantly suppressing metal particle-induced surface charge accumulation of spacers in DC gas-insulated power transmission lines

Significantly suppressing metal particle-induced surface charge accumulation of spacers in DC gas-insulated power transmission lines

Thermally Conductive Anticorrosive Epoxy Nanocomposites with Tannic Acid-Modified Boron Nitride Nanosheets

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

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