Comparison between the electroluminescence and space charge of ultraviolet and thermally aged low density polyethylene

Mills, D. H.; Lewin, P.L.; Chen, G.

doi:10.1109/ceidp.2010.5724009

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…It was found that EL intensity increases with increasing applied voltage for both virgin and thermally aged LDPE. This is consistent with many other studies [8]- [9]. Ageing temperature also influence the EL emission with LDPE aged at lower temperature (310 K) has higher EL intensity than that of higher temperature (350 K) [7].…”

Section: Frequency Dependance Of Electroluminescence Measurement In Lsupporting

confidence: 81%

Frequency Dependence of Electroluminescence Measurement in LDPE

Bani

Abdul‐Malek

Aris

et al. 2017

IJECE

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A good insulator for high voltage cable has low dielectric loss, reasonable flexibility and thermo-mechanically stable. However, prolonged application of electrical stresses on the cable will degraded the cable; physically and morphologically. Electrical degradation in high voltage cable can be detected using electroluminescence (EL) method. Electroluminescence is a phenomenon that occurs when the atoms of a material are being excited due to the application of and external high electrical stresses. There are several external factors that affect the behaviour of electroluminescence emission such as, applied voltage, applied frequency, ageing of material and types of materials. . In this paper, the EL measurement is employed to determine the effect of applied frequency on virgin LDPE at fixed and varying applied voltage. It can be observed that EL emission increases as applied frequency increases with increasing voltage applied. However, interesting EL behaviour is observed when varying frequency is applied from 10 Hz to 100 Hz.

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Section: Frequency Dependance Of Electroluminescence Measurement In Lsupporting

confidence: 81%

Frequency Dependence of Electroluminescence Measurement in LDPE

Bani

Abdul‐Malek

Aris

et al. 2017

IJECE

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“…This is true for both positive and negative half cycle of the applied field and supported by work of other literature [4--7]. Shifting of peak emission away from peak of applied field should occurs as applied field is increased due to increasing charge build up near the injecting electrode thus reducing the local field as obtained by other work of literature [7]. However, a closer observation shows that it happened for applied field below 4.5kV.…”

Section: Sample Preparationmentioning

confidence: 43%

“…All EL peaks occur prior to the peak of the applied field but the peak of EL emission in aged samples moves towards the applied field peak for lower ageing temperature in both positive and negative half cycle. This phenomenon in the aged samples could be caused by the increased in the mobility of the charges and hence charges are able to travel deeper into the material reducing the charge build up in the electrode--polymer interface [7]. Figure 4 shows the FTIR optical transmission of virgin and aged LDPE before being used in EL measurements.…”

Section: Results and Discussion Electroluminescence Measurementmentioning

confidence: 99%

Characteristics of electroluminescence phenomenon in virgin and thermally aged LDPE

Bani

Abdul‐Malek

Ahmad

et al. 2015

AIP Conference Proceedings

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“…FTIR spectrum of thermally aged PE shows an appearance of a new absorbance peak around 1750 cm −1 . This peak like in EP, is attributable to oxidation of the material due to thermal ageing , apparently contributing to formation of deep traps. It may be noted that in Figures and , only the frequency range below 3000 cm −1 has been shown, in order to make the changes at 1750 cm −1 easily discernible.…”

Section: Resultsmentioning

confidence: 95%

Charge trapping and transport phenomenon in aged and unaged epoxy resin and polyethylene

Das

Gupta

2014

Int. Trans. Electr. Energ. Syst.

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Summary Polymeric dielectrics are prone to space charge trapping within their volume. This in turn affects many of their dielectric properties including breakdown strength and charge transport. In the current paper, we attempt to characterise charge accumulation and transport in polymeric dielectrics under the application of DC field. Epoxy (EP) resin and polyethylene (PE) are chosen as the dielectric materials to be investigated on account of their prevalence in the high voltage industry. Pulsed electro‐acoustic measurements are performed on EP resin and PE specimens. Further, effect of ageing on charge trapping is studied for both EP resin and PE, by thermally ageing the materials under controlled conditions. In addition, the dielectric materials are exposed to a humid environment over long periods and the effect of prolonged exposure to moisture on charge trapping studied. From the experimental results, density of trapped charge is obtained for the different cases. Fourier transform infrared spectroscopy is carried out to identify chemical changes in dielectric materials due to ageing, with an aim to relating physicochemical changes in the material to charge trapping. Copyright © 2014 John Wiley & Sons, Ltd.

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Comparison between the electroluminescence and space charge of ultraviolet and thermally aged low density polyethylene

Cited by 6 publications

References 11 publications

Frequency Dependence of Electroluminescence Measurement in LDPE

Frequency Dependence of Electroluminescence Measurement in LDPE

Characteristics of electroluminescence phenomenon in virgin and thermally aged LDPE

Charge trapping and transport phenomenon in aged and unaged epoxy resin and polyethylene

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