Bulg. J. Phys. vol.20 no.1-2 (1993), pp. 042-051



Obtaining Polymer Corona Charging Electrets in the Presence of Different Gases

P.G. Karmazova1, M.S. Mintchev1, G.A. Mekishev2
1Higher Institute of Food and Flavor Industry, 26 Maritza Blvd, Plovdiv 4000
2Paissii Hilendarsky Plovdiv University, 24 Tzar Asen Str., Plovdiv 4000
Abstract. The influence of gas medium in which electrets have been obtained on the time dependence of surface potential was investigated. The explicit form of the dependence was obtained and the coefficients of regression equations were calculated. The values of transit time and mobility of charge carriers of leading front were calculated and a comparison with the injection model was made. The difference in the effect of gas media on the rate of charge decay of electrets is supposed to be due to different kinds of surface traplevels which arise from the interaction of gas ions with sample surfaces.

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