Title :
Changes of space charge profiles in PET electrets after thermally stimulated discharges
Author_Institution :
Inst. of Electr. Eng. Fundamentals, Wroclaw Univ. of Technol., Poland
Abstract :
Behaviour of electric charges in a PET film has been investigated under the condition of partial discharging at higher annealing temperatures. The PET electrets corona-charged at room temperature and 440 K were investigated. The step electroacoustic method was used for the measurement of the space charge distributions along the sample thickness. The highest surface charge densities, and charge stability were obtained after negative corona charging at 440 K.
Keywords :
charge measurement; corona; electrets; partial discharges; polymer films; space charge; thermally stimulated currents; 440 K; PET electrets; PET film; annealing temperatures; charge stability; corona-charged electrets; electric charges; negative corona charging; partial discharging; space charge distribution measurement; space charge profiles; step electroacoustic method; Annealing; Charge measurement; Current measurement; Electrets; Positron emission tomography; Space charge; Surface charging; Surface discharges; Temperature; Thickness measurement;
Conference_Titel :
Electrets, 2002. ISE 11. Proceedings. 11th International Symposium on
Print_ISBN :
0-7803-7560-2
DOI :
10.1109/ISE.2002.1042989
