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CORONA ELECTRETS OBTAINED IN DIFFERENT GAS MEDIA

T. Yovcheva1,* , G. Mekishev1, St. Nedev1

Affiliation

  1. Department of Experimental Physics, University of Plovdiv, 24 Tzar Assen Str., 4000 Plovdiv, Bulgaria

Abstract

The influence of the gas medium in which electrets have been obtained on the time dependence and temperature dependence of the surface potential was investigated. Samples of 20 µm thick polypropylene (PP) film were used. The gases used were air, oxygen and nitrogen. The difference in the effects of gas media on the rate of charge decay of the electrets was supposed to be due to different kinds of surface traps, which arise from the interaction between gas ions and sample surfaces..

Keywords

Electret, Corona discharge, Gas media, Polypropylene.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

T. Yovcheva, G. Mekishev, St. Nedev, CORONA ELECTRETS OBTAINED IN DIFFERENT GAS MEDIA, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 237-241 (2005)