Electrical Behavior of the Insulator Class-E around Glass Transition: Experimental and Numerical Analyses |
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| Authors: | S Berdous N Saidi Amroun M Saidi M Bendaoud |
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| Institution: | 1. Material Physics Laboratory, Physics Faculty, University of Science and Technology (USTHB) , Algiers , Algeria;2. High National School of Veterinary (ENSV) , Algiers , Algeria;3. Material Physics Laboratory, Physics Faculty, University of Science and Technology (USTHB) , Algiers , Algeria |
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| Abstract: | Currents flowing through semicrystalline polyethylene terephthalate (PET) film were measured over the temperature range 60°–100°C in electric fields from 24 × 106 to 72 × 106 V/m. A study of the influence of these external stresses on the electrical behavior of PET, at glass transition phase, permitted interpreting its response in terms of dipolar relaxation and movements of free charges. The simulation of the charging current around the glass transition temperature using a model consisting of the presence of bipolar carriers and one kind of permanent dipole with relaxation time τ allowed reproducing the experimental behavior. From this numerical calculation, space dependence of charge densities and field can be determined in order to explain the electrical behavior of current, which depends on parameters such as injection coefficient A i , relaxation time τ, and mobility μ. |
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| Keywords: | Bipolar carriers Class-E insulator Electrical response Numerical simulation Polarization Polyethylene terephthalate |
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