Charging Characteristics of EPDM and Silicone Rubbers Deduced from Surface Potential Measurements

Sjöstedt, Hans; Gubanski, Stanislaw; Serdyuk, Yuriy V.

doi:10.1109/tdei.2009.5128508

Cited by 94 publications

(20 citation statements)

References 19 publications

(31 reference statements)

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“…Charge transportation was considered to be usually associated with carrier trapping and de-trapping [19]. The energy of the traps was related to time by considering so called demarcation energy E m , indicating the border between emptied and occupied traps [19].…”

Section: Mathematical Treatmentmentioning

confidence: 99%

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Dynamic behavior of surface charge on direct- fluorinated polyimide films

2013

IEEE Trans. Dielect. Electr. Insul.

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Polyimide film, as a special type of engineering plastic film, is a kind of basic insulating material and is widely applied in the aerial, nuclear, microelectronic industry, turn to turn insulation and turn to ground insulation of inverter-fed motors. However, premature insulation failures occur frequently in motors with the disadvantage of pure PI inherent in all organic materials. The existence of surface charge has a great effect on breakdown characteristic and is the main reason leading to dielectric breakdown. Fluorination as change the chemical component in surface layer of polymers should give rise to the corresponding change in electrical properties of the surface layer thus influence the charge injection from electrodes when they are used as an insulator. This paper presents a study aimed at clarifying the effect of fluorination time on surface charge accumulation and decay behaviors of fluorinated polyimide film. Samples were surface fluorinated in a laboratory vessel at about 328 K (55 ℃) using a F 2 /N 2 mixture with 20% F 2 by volume and 0.05 MPa (500 mbar) for respectively 15, 30, 45 and 60 minutes. Corona charging tests were performed at room temperature with a relative humidity of ~ 40%. The charge distribution was measured by means of an electrostatic voltmeter. Obtained results show the dependence of the charge density as well as the charge decay rate upon the fluorination time of samples, varying as a function of the charge polarity and charging time. It is suggested that the fluorination can significantly improve the decay rate of the surface charge in polyimide films.

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Section: Mathematical Treatmentmentioning

confidence: 99%

“…The energy of the traps was related to time by considering so called demarcation energy E m , indicating the border between emptied and occupied traps [19]. With increasing time, E m moves away from the conduction band and the relation between time and the energy gap is defined as…”

Section: Mathematical Treatmentmentioning

confidence: 99%

Dynamic behavior of surface charge on direct- fluorinated polyimide films

2013

IEEE Trans. Dielect. Electr. Insul.

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“…Thus most commercially available silicones are reinforced with a large amount of fumed silica (up to 40 wt%) to improve the mechanical and dielectric properties as well as to lower the cost 9 . Despite its technical importance, the charge transport properties in this type of silicone-based composite are rarely reported [9][10][11][12] . In this work, the high field charge transport of SiO 2 reinforced silicone rubber was comprehensively studied using pulsed electro-acoustic (PEA) space charge measurements and bulk dc current measurements in a range of fields until dielectric breakdown.…”

Section: Introductionmentioning

confidence: 99%

On the nature of high field charge transport in reinforced silicone dielectrics: Experiment and simulation

Huang

Schadler

2016

Journal of Applied Physics

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The high field charge injection and transport properties in reinforced silicone dielectrics were investigated by measuring the time-dependent space charge distribution and the current under dc conditions up to the breakdown field, and were compared with properties of other dielectric polymers. It is argued that the energy and spatial distribution of localized electronic states are crucial to determining these properties for polymer dielectrics. Tunneling to localized states likely dominates the charge injection process. A transient transport regime arises due to the relaxation of charge carriers into deep traps at the energy band tails, and is successfully verified by a Monte Carlo simulation using the multiple-hopping model. The charge carrier mobility is found to be highly heterogeneous due to non-uniform trapping. The slow moving electron packet exhibits a negative field dependent drift velocity possibly due to the spatial disorder of traps.

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“…Gubanski et al reported spatial and temporal distributions of surface charge on ethylene propylene diene monomer rubber and SiR, with varying voltages and pulse numbers. They also investigated the mechanism of surface potential decay in high-temperature-vulcanized SiR in relation to air and bulk properties [9][10][11]. Li et al reported the charge transport of epoxy resin/glass composition (FR4), polytetrafluoroethylene and polyimide.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Charge Accumulation and Decay on Silicone Rubber/SiO₂Nanocomposite Surface

Liu¹,

Li²,

Du³

2016

Journal of Electrical Engineering and Technology

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-The accumulation and decay of surface charge on silicone rubber (SiR)/SiO 2 nanocomposites under a unipolar corona discharge field was investigated. The effect of the weight ratio of SiO 2 nanoparticles from 0.1 to 0.7 wt.% was studied. Attenuated total reflection infrared spectra of the SiR/SiO 2 nanocomposites indicated that the SiO 2 nanoparticles chemically and physically interacted with the SiR matrix. This facilitated the SiR chains in restricting the injection of surface charge into the bulk nanocomposite. SiR composites containing SiO 2 nanoparticles (especially that containing 0.1 wt.% SiO 2 ) exhibited significantly reduced surface discharge. This approach may have application in outdoor SiR electrical insulators.

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Charging Characteristics of EPDM and Silicone Rubbers Deduced from Surface Potential Measurements

Cited by 94 publications

References 19 publications

Dynamic behavior of surface charge on direct- fluorinated polyimide films

Dynamic behavior of surface charge on direct- fluorinated polyimide films

On the nature of high field charge transport in reinforced silicone dielectrics: Experiment and simulation

Kinetics of Charge Accumulation and Decay on Silicone Rubber/SiO₂Nanocomposite Surface

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Charging Characteristics of EPDM and Silicone Rubbers Deduced from Surface Potential Measurements

Cited by 94 publications

References 19 publications

Dynamic behavior of surface charge on direct- fluorinated polyimide films

Dynamic behavior of surface charge on direct- fluorinated polyimide films

On the nature of high field charge transport in reinforced silicone dielectrics: Experiment and simulation

Kinetics of Charge Accumulation and Decay on Silicone Rubber/SiO2Nanocomposite Surface

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Product

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Kinetics of Charge Accumulation and Decay on Silicone Rubber/SiO₂Nanocomposite Surface