Title :
A mathematical model for charging currents of polymeric insulating materials
Author :
Montanari, G.C. ; Motori, A. ; Sandrolini, F.
Author_Institution :
Istituto di Elettrotecnica Ind., Bologna Univ., Italy
Abstract :
A model for the long-term behavior of charging current is proposed. It is based on the “universal” law of Jonscher (1983), where a threshold term, function of the steady-state current, has been introduced. On the basis of several sets of data relevant to different insulating polymeric materials, it is shown that the DC conductivity can be evaluated, in many cases, even by not too-long test times. Correct estimates of the activation energy of conduction, as well as of polarization processes, can be obtained by means of the model
Keywords :
Conducting materials; Conductivity; Current measurement; Mathematical model; Optical polarization; Plastic insulation; Polymers; Steady-state; Testing; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1994., Proceedings of the 4th International Conference on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
0-7803-1307-0
DOI :
10.1109/ICPADM.1994.413929
