Measurements of frozen-in polarization in PET electrets using E-j method

• Autorzy: Motyl E.
• Konferencja: II International Conference on Advances in Processing, Testing and Application of Dielectric Materials, 15-17 September, Wrocław 2004
• Języki publikacji: EN

Abstrakty

EN

Step elcctroacoustic (SEA) and thermally stimulated depolarisation (TSD) techniques were applied for analysis of electret slate in polyethylene-terephthalate samples after corona charging at low and high temperatures. Measurements of electric field distributions E and current density j_TSD during thermally stimulated discharging allow to get information on real charge density and quasi-frozen polarisation in dielectric. The above E-j method is a useful tool for measurement of local values of real and polarization charges in PET electrets and their decay in time. Positive and negative coronas as well as temperature of charging affect the storage of real charges and polarisation in PET electrets.

Słowa kluczowe

EN

PET electret; space charge; polarisation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje
• Rocznik: 2004
• Tom: Vol. 40, nr 15
• Strony: 41--45
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Motyl E.

• Wrocław University of Technology, Institute of Electrical Engineering Fundamentals

Bibliografia

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• [6] MOTYL E. and KRAUSE T., Application of TSD and SEA methods for measurements of space charge and polarisation in PET electrets,Proc. 7th Int. Conf. Properties and Applications of Dielectric Materials, Nagoya, 2003, pp.900-903.
• [7] MOTYL E., Measurements of interfacial charges in layered PTFE using step electroacoustic technique, J. Electrostat., vol. 51&52 (2001), pp. 522-529.
• [8] VAN TURNHOUT J., Thermally stimulated discharge of polymer electrets, Leiden, Krips Repro B.V. Meppel, 1972.
• [9] MOTYL E, "The space charge investigations in PET foils after charging in high fields", Materials Science, vol. 16 (1990), pp. 231-236.