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The absorption charging Ich and discharging Idis currents of the cable polyethylene insulation before and after thermal aging were investigated experimentally. These data are analyzed on the basis of two physics models which correspond to Maxwell and Voigt equivalent circuits. The aim of the work is to show that measurements of absorption characteristics are nondestructive diagnostic method of electrical...
The aim of this work consists in pursuit of electret structure with excess humidity and high thermostability. The charge relaxation mechanism in polyimide and modified polyimide films is established. It is shown that the layers of polytetrafluoroethylene on surface of polyimide films lead to essential increasing of electret state stability at elevated temperature and high humidity. The currents of...
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