Role of interphase on the resistance to high-voltage arcing, on tracking and erosion of silicone/SiO<sub>2</sub> nanocomposites

Raetzke, Stephanie; Kindersberger, J.

doi:10.1109/tdei.2010.5448118

Cited by 117 publications

(62 citation statements)

References 14 publications

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“…Indeed, thanks to the presence of the nanofiller/polymer interfaces [5][6][7][8][9], such material systems have been envisioned as an answer to many high voltage insulation problems [10]. For example, the partial discharge resistance, electrical treeing growth, space charge formation and dielectric breakdown performance of nanodielectrics have been compared with the respective unfilled and microfilled counterparts and worthwhile improvements in such properties have been reported [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Polyethylene/silica nanocomposites: absorption current and the interpretation of SCLC

Lau

Vaughan

Chen

et al. 2016

J. Phys. D: Appl. Phys.

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The topic of nanodielectrics continues to receive significant attention from today's dielectrics community, due to the property enhancements that can stem from the unique interfacial features within such material systems. Nevertheless, understanding of the interfacial phenomena that occur in nanodielectrics and which determine their electrical behaviour is challenging. In this paper, we report on an investigation into the absorption current behaviour of two nanocomposite systems, one containing an untreated nanosilica and the other containing the same nanofiller chemically modified using trimethoxy(propyl)silane.The results indicate that the absorption current behaviour of all the nanocomposites is very different from that of the reference, unfilled polymer; while the current flowing through the unfilled polyethylene decreased monotonically with time in a conventional manner, all nanocomposites revealed an initial decrease followed by a period in which the current increased with increasing time of electric field application. Possible mechanisms leading to the observed absorption current behaviour in the nanocomposites are discussed with the aid of space charge measurements. The presence of space charge limited conduction (SCLC) and its trap-filled limit is proposed.Keywords: nanocomposites, nanosilica, interface, absorption current, space charge limited conduction. 2 IntroductionThe addition of a nanofiller to a polymer matrix has been shown to be a flexible means of tailoring the dielectric properties of materials [1][2][3] and Chen et al. [19], for example, have emphasized the unsatisfactory nature of our understanding of charge transport mechanisms. In conventional polymeric insulation, charge transport mechanisms are extremely complicated, when compared with many conducting and semiconducting materials [20,21]. In semicrystalline polyethylene, for example, chainfolded lamellar crystals are surrounded by amorphous conformations and there is likely to be a high concentration of traps relating to each of these structural motifs. On the addition of a nanofiller, charge transport mechanisms will become yet more complicated, since the inclusion of nanoparticles will introduce extensive interfacial surfaces between the nanofiller and the polymer. The presence of such interfaces may directly introduce additional nanofiller/polymer trapping sites and/or modify the surrounding polymer morphology, thereby affecting the local density of states within the system.The current flow caused by the action of an applied electric field on charge carriers within a dielectric material can broadly be categorized into three types [22]: the initial current that flows through the material is the capacitive charging current, which causes a dramatic rise at the very beginning of the voltage application. This is followed by a gradual decrease of current, known as the absorption current or the anomalous current. Conventionally, the absorption current decreases slowly until it reaches a quasi-steady state, providing a conduction c...

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Section: Introductionmentioning

confidence: 99%

Polyethylene/silica nanocomposites: absorption current and the interpretation of SCLC

Lau

Vaughan

Chen

et al. 2016

J. Phys. D: Appl. Phys.

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“…In addition, the application of high density polyethylene nanocomposites in electrical insulation perspectives has been investigated deeply, and is found that it has excellent dielectric strength, volume resistivity and surface resistivity [7]. As an important material of the main insulation in high voltage equipment, epoxy nanocomposites have good space charge behavior, PD resistance and dielectric strength [29,30]. All of these have confirmed polymer nanocomposites have great potential application in high voltage industry field.…”

Section: Sol-gel Methodsmentioning

confidence: 95%

Preparation and Prospect of Polymer Nanocomposites Used in High Voltage Equipment

Xinna¹,

Chengli²

2017

Proceedings of the 3rd Annual International Conference on Advanced Material Engineering (AME 2017)

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Abstract. Recently, in the field of high voltage equipment, polymer nanocomposites have received increasing attentions, due to their excellent electrical properties, such as high breakdown strength and high resistance to partial discharges, and their good mechanical and thermal properties, such as high mechanical strength and high heat durability and so on. In this article, the main preparation methods of polymer nanocomposites, including of blending method, intercalation compound method, in-situ polymerization method and sol-gel method, are reviewed, and the merits and faults of different methods are discussed.

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“…To explain this, the addition of nanoparticles leads to an increase in charge carrier mobility and decrease in average hopping distance relative to polymer matrix. Raetzke and Kindersberger [9] have developed the interface volume model to explain the role of interface content in enhancement of dielectric properties. It shows that for higher interface thickness (in nm), maximum value of interface volume content (in vol %) is observed.…”

Section: Reactions At the Interaction Zonementioning

confidence: 99%

A Review on Nanocomposite Based Electrical Insulations

Paramane¹,

Kumar²

2016

Transactions on Electrical and Electronic Materials

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The potential of nanocomposites have been drawing the intention of the researchers from energy storage to electrical insulation applications. Nanocomposites are known to improve dielectric properties, such as the increase in dielectric breakdown strength, suppressing the partial discharge (PD) as well as space charge, and prolonging the treeing, etc. In this review, different theories have been established to explain the reactions at the interaction zone of polymer matrix and nanofiller; the characterization methods of nanocomposites are also presented. Furthermore, the remarkable findings in the fields of epoxy, cross-linked polyethylene (XLPE), polypropylene and polyvinyl chloride (PVC) nanocomposites are reviewed. In this study, it was observed that there is lack of comparison between results of lab scale specimens and actual field aged cables. Also, non-standardization of the preparation methods and processing parameters lead to changes in the polymer structure and its surface degradation. However, on the positive side, recent attempt of 250 kV XLPE nanocomposite HVDC cables in service may deliver a promising performance in the coming years. Moreover, materials such as self-healing polymer nanocomposites may emerge as substitutes to traditional insulations.

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Role of interphase on the resistance to high-voltage arcing, on tracking and erosion of silicone/SiO₂ nanocomposites

Cited by 117 publications

References 14 publications

Polyethylene/silica nanocomposites: absorption current and the interpretation of SCLC

Polyethylene/silica nanocomposites: absorption current and the interpretation of SCLC

Preparation and Prospect of Polymer Nanocomposites Used in High Voltage Equipment

A Review on Nanocomposite Based Electrical Insulations

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Role of interphase on the resistance to high-voltage arcing, on tracking and erosion of silicone/SiO2 nanocomposites

Cited by 117 publications

References 14 publications

Polyethylene/silica nanocomposites: absorption current and the interpretation of SCLC

Polyethylene/silica nanocomposites: absorption current and the interpretation of SCLC

Preparation and Prospect of Polymer Nanocomposites Used in High Voltage Equipment

A Review on Nanocomposite Based Electrical Insulations

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Role of interphase on the resistance to high-voltage arcing, on tracking and erosion of silicone/SiO₂ nanocomposites