Title :
The thermal-step-technique applied to the study of charge decay in polyethylene thermoelectrets
Author :
Toureille, A. ; Reboul, J.P.
Author_Institution :
Univ. des Sci. et Tech. du Languedoc, Montpellier, France
Abstract :
A nondestructive method for locating the space charge and measuring the residual electric field inside thick samples is described. The techniques consists of applying a thermal step on one or the other side of the sample. The propagation of the thermal expansion and the relative shift of the charges induce currents in the external circuit which are then computed. The method has been used to study the change of charge density and charge location, as a function of time, in several polyethylene (PE) thermoelectrets formed under different charging conditions
Keywords :
electric fields; polymers; space charge; thermal expansion; thermoelectrets; charge decay; charge density; currents; nondestructive method; polyethylene thermoelectrets; residual electric field; space charge; thermal expansion; thermal-step-technique; thick samples; Charge measurement; Circuits; Current measurement; Electric variables measurement; Electrodes; Polyethylene; Space charge; Temperature; Thermal expansion; Thickness measurement;
Conference_Titel :
Electrets, 1988. (ISE 6) Proceedings., 6th International Symposium on (IEEE Cat. No.88CH2593-2)
Conference_Location :
Oxford
DOI :
10.1109/ISE.1988.38518
