DC breakdown and flashover characteristics of direct fluorinated epoxy/Al<sub>2</sub>O<sub>3</sub> nanocomposites

Wang, Feipeng; Zhang, Tao; Li, Jian; Zeeshan, Khan Muhammad; He, Li; Huang, Zhengyong; He, Yushuang

doi:10.1109/tdei.2018.007642

Cited by 27 publications

(18 citation statements)

References 25 publications

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“…This shows all three kinds of chosen coupling agents have been proved to be effective options to modify the surface of the nanoparticle, which increases both the density and energy of deep traps. The changes of deep traps increase the DC breakdown strength [24]. In conclusion, the composite samples using surface‐treated nanoparticles exhibit higher breakdown strength than the base polymer, which means adding nano‐alumina into PE has a positive impact on insulation performance.…”

Section: Resultsmentioning

confidence: 99%

“…Before the intrinsic breakdown happens, local breakdown exists between each individual particle and base polymer. However, due to the limited size of nano‐particles and reduced spherulite size, the total length of the breakdown path increases, which enhances the breakdown strength of the composite system [7, 24, 31, 32]. When the loading content is 0.5 phr, all the surfaced modified samples exhibit higher DC breakdown strength compared with the virgin LDPE sample.…”

Section: Resultsmentioning

confidence: 99%

“…The trap distribution is tightly linked with the electrical performance of nanocomposites. The deep trap is believed to have the ability to capture more charge carriers and therefore reduce the carrier charge mobility [22][23][24][25][26][27][28][29][30][31][32][33][34]. This can also be verified by the enhanced DC resistivity of LDPE/nano-alumina with surface modification.…”

Section: Tsc and Trap Distributionmentioning

confidence: 99%

“…Deep traps could lead to the increase of breakdown strength as they reduce the charge mobility and the mean-free path of electron acceleration through capturing the charge carriers [20,21]. Moreover, the trap density and shallow traps also have an effect on breakdown strength but the relationship between these parameters is not fully clear yet [6,7,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Effect of different surface treatment agents on the physical chemistry and electrical properties of polyethylene nano‐alumina nanocomposites

et al. 2020

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Generally, the electrical properties of nanocomposite are affected by the type, size, filling concentration and surface treatment process of the nanoparticle. In this study, nanocomposites of polyethylene (PE) with varying filling contents of nano‐alumina particles were prepared by the melting blending method and three different kinds of coupling agents were applied for surface modification properties of the nanoparticles. Two of them were silane based and the other was titanate based. The effect of different coupling agents on the dielectric properties was studied. Fourier‐transform infrared spectroscopy and thermo‐gravimetric analysis were used to verify their compositions. Scanning electron microscope and polarised optical microscopy were used for morphology study. Dielectric permittivity, direct current (DC) volume resistivity and DC breakdown strength characterised their improved insulation performance with nano‐alumina as filler. Thermal stimulated current results revealed that adding nano‐alumina particles into low‐density PE could provide more deep traps and increase DC resistivity.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Tsc and Trap Distributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of different surface treatment agents on the physical chemistry and electrical properties of polyethylene nano‐alumina nanocomposites

et al. 2020

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“…Numerous studies have shown that surface fluorination is an effective way to improve the surface flashover performance in vacuum of insulator materials [85][86][87][88][89][90][91][92][93][94], including epoxy and its composite [85,93], high-density polyethylene (HDPE) [93], polystyrene (PS) [94] and other materials. Authors apply the fluorination treatment method in low-density polyethylene (LDPE) to improve the surface flashover voltages and the surface potential decay (SPD) to characterise properties of insulator surface [95].…”

Section: Surface Modificationmentioning

confidence: 99%

Improvement of surface flashover in vacuum

2020

High Voltage

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Surface flashover of insulation systems is a basic issue in the field of high voltage and electrical insulation. To improve the surface flashover performance is of great significance for the development of advanced power transmission equipment and insulation materials. This study reviews the research progress of surface flashover in vacuum regarding to effective methods to improve the surface flashover performance in vacuum, including insulation system optimisation and material modification. The former one is beneficial to reduce the electric field distortion, and the later one is able to adjust the surface trap parameters of the material through physical and chemical methods. In addition, the 'U-shaped' curve is proposed to reveal the relationship between surface flashover voltage and surface trap level, discovering the synthetic effects of surface traps on surface flashover. It is expected that the 'U-shaped' curve will become a guidance to improve surface flashover performance through adjusting trap parameters. Moreover, several suggestions are made to build unified surface flashover model which is suitable to the range from high vacuum to high pressure.

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Effects of 6FAP on the Electrical Properties of Al₂O₃/Epoxy Resin Composites

Zheng,

Zhang,

Jiao

et al. 2024

J of Applied Polymer Sci

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The fluorination of Al2O3/epoxy composites is achieved through the grafting of 2,2‐bis(3‐amino‐4‐hydroxyphenyl) hexafluoro propane (6FAP) onto the epoxy molecule via ring‐opening reactions. The microstructures, Fourier infrared spectra, and water contact angle of the untreated and fluorinated Al2O3/epoxy composites are characterized. The composites' dielectric properties and DC conductivity, DC breakdown, surface flashover, and surface potential decay are also measured. The results demonstrate that 6FAP has been successfully grafted onto the epoxy molecules, and Al2O3 particles are uniformly distributed in the composite. The hydrophilicity of the fluorinated Al2O3/epoxy composite is enhanced. The fluorinated Al2O3/epoxy composite exhibits more favorable electrical properties than the untreated composite. The breakdown strength and surface flashover voltage of the fluorinated Al2O3/epoxy composite increased by 12.98% and 11.10%, respectively. Compared to the untreated composite, the deep trap density of the fluorinated Al2O3/epoxy composite increases, which contributes to the reduction in carrier mobility and to the enhancement of breakdown strength and surface flashover voltage. This work suggests that fluorination via 6FAP has potential applications in the improvement of electrically insulating materials.

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DC breakdown and flashover characteristics of direct fluorinated epoxy/Al₂O₃ nanocomposites

Cited by 27 publications

References 25 publications

Effect of different surface treatment agents on the physical chemistry and electrical properties of polyethylene nano‐alumina nanocomposites

Effect of different surface treatment agents on the physical chemistry and electrical properties of polyethylene nano‐alumina nanocomposites

Improvement of surface flashover in vacuum

Effects of 6FAP on the Electrical Properties of Al₂O₃/Epoxy Resin Composites

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DC breakdown and flashover characteristics of direct fluorinated epoxy/Al2O3 nanocomposites

Cited by 27 publications

References 25 publications

Effect of different surface treatment agents on the physical chemistry and electrical properties of polyethylene nano‐alumina nanocomposites

Effect of different surface treatment agents on the physical chemistry and electrical properties of polyethylene nano‐alumina nanocomposites

Improvement of surface flashover in vacuum

Effects of 6FAP on the Electrical Properties of Al2O3/Epoxy Resin Composites

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Product

Resources

About

DC breakdown and flashover characteristics of direct fluorinated epoxy/Al₂O₃ nanocomposites

Effects of 6FAP on the Electrical Properties of Al₂O₃/Epoxy Resin Composites