Studies of space charge in electrically aged low density polyethylene

Eugen Neagu; Maria do Carmo Henriques Lança; José Narciso Marat-mendes

doi:10.1109/ISE.2002.1042935

Studies of space charge in electrically aged low density polyethylene

Eugen Neagu, Maria do Carmo Henriques Lança, José Narciso Marat-mendes

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Citations (Scopus)

Abstract

Space charge in electrically aged LDPE was studied using a recently developed technique combining isothermal charging and discharging with non-isothermal measurements. Samples were aged in a NaCl aqueous solution at 40°C for 1500h under an AC field of 6MV/m (50Hz). The samples were then isothermally DC charged and discharged (both currents recorded). Next a non-isothermal experiment with constant heating rate was performed. Finally the sample was kept at the highest temperature and the final isothermal discharge current registered. The last step has to be carried on for long time to ensure an almost complete discharge of the remnant charge so that results become reproducible and possible to analyze. Selective charging (careful choice of the field, temperature and the ratio of charging/discharging times) revealed the presence of different trapping sites. From the analysis of the isothermal and non-isothermal data the relaxation times and activation energies could be obtained.

Original language	English
Title of host publication	11th International Symposium on Electrets (ISE11)
Subtitle of host publication	1-3 October 2002 Novotel Hotel, Glen Waverley, Melbourne, Australia: Proceedings
Place of Publication	Piscataway
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	19-22
Number of pages	4
ISBN (Print)	0-7803-7560-2
DOIs	https://doi.org/10.1109/ISE.2002.1042935
Publication status	Published - 2002
Event	11th International Symposium on Electrets - Novotel Hotel, Glen Waverley, Melbourne, Australia Duration: 1 Oct 2002 → 3 Oct 2002

Conference

Conference	11th International Symposium on Electrets
Abbreviated title	ISE 11
Country/Territory	Australia
City	Melbourne
Period	1/10/02 → 3/10/02

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Neagu, E., Lança, M. D. C. H., & Marat-mendes, J. N. (2002). Studies of space charge in electrically aged low density polyethylene. In 11th International Symposium on Electrets (ISE11): 1-3 October 2002 Novotel Hotel, Glen Waverley, Melbourne, Australia: Proceedings (pp. 19-22). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ISE.2002.1042935

Neagu, Eugen ; Lança, Maria do Carmo Henriques ; Marat-mendes, José Narciso. / Studies of space charge in electrically aged low density polyethylene. 11th International Symposium on Electrets (ISE11): 1-3 October 2002 Novotel Hotel, Glen Waverley, Melbourne, Australia: Proceedings. Piscataway : Institute of Electrical and Electronics Engineers (IEEE), 2002. pp. 19-22

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abstract = "Space charge in electrically aged LDPE was studied using a recently developed technique combining isothermal charging and discharging with non-isothermal measurements. Samples were aged in a NaCl aqueous solution at 40°C for 1500h under an AC field of 6MV/m (50Hz). The samples were then isothermally DC charged and discharged (both currents recorded). Next a non-isothermal experiment with constant heating rate was performed. Finally the sample was kept at the highest temperature and the final isothermal discharge current registered. The last step has to be carried on for long time to ensure an almost complete discharge of the remnant charge so that results become reproducible and possible to analyze. Selective charging (careful choice of the field, temperature and the ratio of charging/discharging times) revealed the presence of different trapping sites. From the analysis of the isothermal and non-isothermal data the relaxation times and activation energies could be obtained.",

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Neagu, E , Lança, MDCH & Marat-mendes, JN 2002, Studies of space charge in electrically aged low density polyethylene. in 11th International Symposium on Electrets (ISE11): 1-3 October 2002 Novotel Hotel, Glen Waverley, Melbourne, Australia: Proceedings. Institute of Electrical and Electronics Engineers (IEEE), Piscataway, pp. 19-22, 11th International Symposium on Electrets, Melbourne, Victoria, Australia, 1/10/02. https://doi.org/10.1109/ISE.2002.1042935

Studies of space charge in electrically aged low density polyethylene. / Neagu, Eugen ; Lança, Maria do Carmo Henriques ; Marat-mendes, José Narciso.
11th International Symposium on Electrets (ISE11): 1-3 October 2002 Novotel Hotel, Glen Waverley, Melbourne, Australia: Proceedings. Piscataway: Institute of Electrical and Electronics Engineers (IEEE), 2002. p. 19-22.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - Space charge in electrically aged LDPE was studied using a recently developed technique combining isothermal charging and discharging with non-isothermal measurements. Samples were aged in a NaCl aqueous solution at 40°C for 1500h under an AC field of 6MV/m (50Hz). The samples were then isothermally DC charged and discharged (both currents recorded). Next a non-isothermal experiment with constant heating rate was performed. Finally the sample was kept at the highest temperature and the final isothermal discharge current registered. The last step has to be carried on for long time to ensure an almost complete discharge of the remnant charge so that results become reproducible and possible to analyze. Selective charging (careful choice of the field, temperature and the ratio of charging/discharging times) revealed the presence of different trapping sites. From the analysis of the isothermal and non-isothermal data the relaxation times and activation energies could be obtained.

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Studies of space charge in electrically aged low density polyethylene

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