Electrical Degradation and Breakdown in Polymers

Dissado, L. A.; Fothergill, J.C.

doi:10.1049/pbed009e

Cited by 1,462 publications

(1,103 citation statements)

References 0 publications

Supporting

Mentioning

1,043

Contrasting

Unclassified

Order By: Relevance

“…And J h is the injection current density from the anode. With high voltage applied, charge injection behavior at the metal-polyethylene interface was verified conforming to Schottky injection mechanism 9,20,21 , which has already been applied into some previous modelling works on polyethylene 18,22,23 . Such conduction mechanism demonstrates that barrier height at the electrode-dielectric interface is lowered by the applied field and image charge force so that enhanced current density from electrodes takes place.…”

Section: Volts-on Conditionsupporting

confidence: 61%

“…Dust-Figure method 8 . The general principle of these techniques is to section samples into pieces and then detect the charge distribution on the surface of slices with the use of electrostatic a) Electronic mail: nl4g12@soton.ac.uk attraction of powder or field probe 9 . From late 1970s to mid-1990s, many non-destructive methods have been developed to investigate space charge distribution for solid polymeric materials, e.g.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An improved model to estimate trapping parameters in polymeric materials and its application on normal and aged low-density polyethylenes

Liu

Alghamdi

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

Trapping parameters can be considered as one of the important attributes to describe polymeric materials. In the present paper, a more accurate charge dynamics model has been developed, which takes account of charge dynamics in both volts-on and off stage into simulation. By fitting with measured charge data with the highest R-square value, trapping parameters together with injection barrier of both normal and aged low-density polyethylene (LDPE) samples were estimated using the improved model. The results show that, after long-term ageing process, the injection barriers of both electrons and holes is lowered, overall trap depth is shallower and trap density becomes much greater. Additionally, the changes in parameters for electrons are more sensitive than those of holes after ageing.

show abstract

Section: Volts-on Conditionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

An improved model to estimate trapping parameters in polymeric materials and its application on normal and aged low-density polyethylenes

Liu

Alghamdi

et al. 2015

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…Another particular important observation indicates the appearance of the alternative space charge zones in the middle of the sample bulk, with negative and positive signs, at 110 s and 70 s under 30 and 50 kV respectively. These zones expand with the increase of the DC voltages as it is seen in figure (1. b) at 70 s. They will constitute hetero-charge zones for the sample as it is known in the literature [5,6]. However, at the steady state, the space charge packets disappear as it is indicated in the space charge density profiles of figures (1.a, 1.b) at 200 s. …”

Section: Current Densitiesmentioning

confidence: 73%

“…The existence of the space charges in polymeric insulating materials has been affirmed to cause very serious damages in electrical systems especially under high applied DC voltages [3,4]. For these problems, different techniques for the space charge measurements were developed in order to understand and overcome their effects on the electrical properties such as electrical breakdown and conduction mechanism [5,6]. During these last years, the theoretical modelling and simulation have been integrated for better understanding the space charge dynamics [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Physical and Numerical Modelling for Bipolar Charge Transport in Disorder Polyethylene Under High DC Voltage

Boukhris¹,

Belgaroui²,

Kallel³

2010

ijeei

View full text Add to dashboard Cite

Laboratoire des matériaux composites céramiques et polymères (LaMaCoP) Faculté des sciences de Sfax BP 805 Sfax 3000 Tunisie. imed_boukhris@yahoo.frAbstract: This paper reports on validation of a numerical model for both transient and steady bipolar charge transport, trapping and recombination in polymeric insulators, such as low density polyethylene. The numerical model is based on the high precision Runge-Kutta method for determining mobile and trapped charge local density within the sample, during the application of a DC voltage. In addition, we have applied the finite element method considered as the most general one, which can be applied to any sample shape and boundary conditions. It is applied to resolve Poisson's equation, thus providing the potential and its gradient within the sample and at the dielectric-electrode interfaces. The principal results show the appearance of charge packets for the first time in modeling works although they have long been reported in experimental studies on polyethylene materials. The conditions for the appearance of such packets are discussed. For the net space charge density and the conduction current, the dynamics are in a good agreement with those observed in some experimental works during the transit time of the bipolar carriers. The model is already numerically validated for the space charge densities and the electric field distribution under low DC voltage.

show abstract

“…43 Additionally, the highly electronegative nature of fluorine and the ionic C-F bond may cause scattering of ballistic electrons [44][45] and act as electronic traps. 10 Additionally, molecular dipole moments have been correlated directly with mean electron scattering cross-sections. 46 Although it is not presently clear which mechanism is primarily responsible for breakdown suppression in fluorinated compounds, their comparison with hydrogenated analogs illustrates the effect of bonding character differences on dielectric breakdown.…”

Section: Scamentioning

confidence: 99%

Effect of Silane Coupling Agent Chemistry on Electrical Breakdown Across Hybrid Organic–Inorganic Insulating Films

Diebold

Gordon

Clarke

2014

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Dielectric breakdown measurements were conducted on self-assembled monolayer (SAM)/native silicon oxide hybrid dielectrics using conductive atomic force microscopy (C-AFM). By depositing silane coupling agents (SCAs) through a diffusional barrier layer, SAM roughness was decoupled from chemistry to compare the chemical effects of exposed R-group functionality on * Author to whom correspondence should be addressed. Electronic mail: rdiebold@seas.harvard.edu. 2 dielectric breakdown. Using Weibull and current-voltage (I-V) analysis, the breakdown strength was observed to be independent of SCA R-group length, and the addition of a SAM was seen to improve the breakdown strength relative to native silicon oxide by up to 158%. Fluorinated SCAs were observed to suppress tunneling leakage and exhibited increased breakdown strength relative to their hydrocarbon analogs. Electron trapping, scattering, or attachment processes inherent to the fluorinated moieties are thought to be the origin of the improved breakdown properties.

show abstract

Electrical Degradation and Breakdown in Polymers

Cited by 1,462 publications

References 0 publications

An improved model to estimate trapping parameters in polymeric materials and its application on normal and aged low-density polyethylenes

An improved model to estimate trapping parameters in polymeric materials and its application on normal and aged low-density polyethylenes

Physical and Numerical Modelling for Bipolar Charge Transport in Disorder Polyethylene Under High DC Voltage

Effect of Silane Coupling Agent Chemistry on Electrical Breakdown Across Hybrid Organic–Inorganic Insulating Films

Contact Info

Product

Resources

About