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Study of PET corona electrets at atmospheric and lower pressures

A. VIRANEVA1,* , T. YOVCHEVA1, E. GENCHEVA1, G. MEKISHEV1

Affiliation

  1. Department of Experimental Physics, Plovdiv University “Paisii Hilendarski”, 24 Tsar Asen Str. 4000 Plovdiv, Bulgaria

Abstract

In the present paper poly (ethylene terephthalate) (PET) electrets, 40 μm thick, produced in a corona discharge, were studied. The electrets were charged to different initial surface potentials and were placed into a vacuum chamber under various pressures down to 0.1 mbar for 30 minutes. The surface potential was measured after charging the samples and after removal from the vacuum chamber. The thermo-stimulated discharge currents were recorded for electrets stored at atmospheric and low pressures. The time dependence of surface potential was also studied. The electrets, which have been placed preliminary under low pressure, showed higher time stability at room conditions..

Keywords

Poly (ethylene terephthalate) films, Electrets, Corona discharge, Low pressure, TSC.

Submitted at: Sept. 25, 2007
Accepted at: Feb. 18, 2008

Citation

A. VIRANEVA, T. YOVCHEVA, E. GENCHEVA, G. MEKISHEV, Study of PET corona electrets at atmospheric and lower pressures, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 302-305 (2008)