Characteristics of polymer insulator materials:

Cho, Young-Shin; Lee, Hong-Ki; Shim, Mi-Ja; Kim, Sang–Wook

doi:10.1016/s0254-0584(00)00272-8

Cited by 28 publications

(7 citation statements)

References 9 publications

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“…Equation 1is the continuity equation for charge and current, including the generation and loss of charge carriers such as electrons and holes. Equation (2) describes the transportation of the charge by the applied electric field, and Equation 3is the Poisson equation for electric potential and space charge density. Equation 4represents the spatial integration of the electric field for calculating the electric potential.…”

Section: Charge Transport Modelmentioning

confidence: 99%

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Finite Element Analysis of the Breakdown Prediction for LDPE Stressed by Various Ramp Rates of DC Voltage Based on Molecular Displacement Model

Kim¹,

Kim²,

Lee³

2020

Energies

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Predicting the electrical breakdown of polymers is critical for certifying the endurance and lifetime of high voltage power equipment. Since various factors contribute nonlinearly to the breakdown phenomena of polymer insulators, it is difficult to assess the impact of each factor independently. In this study, we numerically analyzed the breakdown phenomenon because of the ramp rate of the DC voltage applied to a polymer insulator, low-density polyethylene (LDPE), using the finite element method (FEM). To predict the breakdown initiation, we analyzed the relaxation time of the conduction current through the insulator as a significant indicator. The bipolar charge transport (BCT) model was used to analyze the charge behavior within the LDPE, and the breakdown voltage was predicted by incorporating the molecular displacement model. This analysis was conducted for a wide range of ramp rates from 10 to 1500 V/s. The current density was calculated using two different methods, namely the energy and average methods, and the results were compared with each other. The results of the numerical model were further verified by comparing with those from experiments reported in the literature.

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Section: Charge Transport Modelmentioning

confidence: 99%

“…In high voltage industry, insulators play an essential role in ensuring durability and extending the life of the electrical equipment [1][2][3]. The mechanisms of electrical failure of insulators are considerably different between DC and AC power systems [4].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of the Breakdown Prediction for LDPE Stressed by Various Ramp Rates of DC Voltage Based on Molecular Displacement Model

Kim¹,

Kim²,

Lee³

2020

Energies

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“…To the group of the layered nanofiller belong graphene and its derivatives. This innovative material is constituted by a single sheet of sp 2 hybridized carbon atoms and therefore shows a honeycomb structure. This bidimensional structure shows excellent thermal and electrical conductivity, similar to carbon nanotubes (CNTs).…”

Section: Layered Nanofiller-modified Epoxiesmentioning

confidence: 99%

“…Epoxy resins are among the most commonly used polymeric materials in structural applications, such as adhesives and fiber-reinforced composites. Moreover, they are widely employed in other nonstructural applications, i.e., as a coating in electronic and textile industries due to their great thermal, electronic, and mechanical properties [1,2].…”

Section: Introductionmentioning

confidence: 99%

Fracture Toughening Mechanisms in Epoxy Adhesives

Zotti¹,

Zuppolini²,

Zarrelli³

et al. 2016

Adhesives - Applications and Properties

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Fracture toughness is generally considered as the main properties of a polymer or a polymer adhesive system for measuring the material resistance to the extension of cracks. Epoxy adhesives are generally brittle in nature; however, the addition of a second dispersed phase could induce a remarkable increase of damage tolerance performance by an enhancement of the material fracture toughness. The fracture behavior of a filled epoxy resin is strongly affected by the dimensions, the shape, and the chemical nature of the considered filler. The chapter describes the different toughening mechanisms for polymer adhesives with special attention toward innovative nanofiller such as graphene nanoplatelets and hyperbranched polymer nanoparticles.

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“…Epoxy resin is a good material for the electrical insulating systems in heavy electric equipments because it has good mechanical and thermal properties as well as excellent electrical properties [1][2][3]. Therefore, new epoxy-based composites having higher performance with lower cost have been developed in the electric application fields and it was found that 65~80 wt% loading of micro-silica improved not only the mechanical and thermal properties but also the dimensional stability of the neat epoxy insulator in the heavy electric equipments which were generally operated at 40-60℃.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Epoxy/Organoclay Nanocomposites for Electrical Insulating Material Using an Ultrasonicator

Park

Park²,

Lee³

2011

Transactions on Electrical and Electronic Materials

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In this paper, we discuss design considerations for an n-channel metal-oxide-semiconductor field-effect transistor (MOSFET) with a lateral asymmetric channel (LAC) doping profile. We employed a 0.35 µm standard complementary MOSFET process for fabrication of the devices. The gates to the LAC doping overlap lengths were 0.5, 1.0, and 1.5 µm. The drain current (I ON), transconductance (g m), substrate current (I SUB), drain to source leakage current (I OFF), and channel-hot-electron (CHE) reliability characteristics were taken into account for optimum device design. The LAC devices with shorter overlap lengths demonstrated improved I ON and g m characteristics. On the other hand, the LAC devices with longer overlap lengths demonstrated improved CHE degradation and I OFF characteristics.

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Characteristics of polymer insulator materials:

Cited by 28 publications

References 9 publications

Finite Element Analysis of the Breakdown Prediction for LDPE Stressed by Various Ramp Rates of DC Voltage Based on Molecular Displacement Model

Finite Element Analysis of the Breakdown Prediction for LDPE Stressed by Various Ramp Rates of DC Voltage Based on Molecular Displacement Model

Fracture Toughening Mechanisms in Epoxy Adhesives

Preparation of Epoxy/Organoclay Nanocomposites for Electrical Insulating Material Using an Ultrasonicator

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