Title :
Electric-field profiles in corona- or electron-beam-charged and thermally treated Teflon PTFE, FEP, and PFA films
Author :
Gerhard-Multhaupt, R. ; Eberle, G. ; Zhongfu, XIA ; Guomao, Yang ; Eisenmenger, W.
Author_Institution :
Tech. Univ. of Darmstadt, Germany
Abstract :
Charge spreading in three different types of Teflon electrets was studied by means of piezoelectrically generated pressure steps, FEP and PFA samples corona-charged at room temperature usually exhibited only a surface charge layer. Uniform charge spreading throughout the bulk was found in FEP charged at or heated to high temperatures. Charge spreading was much less prominent in PFA because of a smaller retrapping efficiency. In PTFE (polytetrafluorethylene), charges from the surface and the rear electrode were injected into the bulk during charging at any temperature. Electron-beam-deposited charge layers broadened significantly upon heating
Keywords :
corona; electrets; electric breakdown of solids; electron beam deposition; electron beam effects; heat treatment; polymer films; FEP film; PFA films; Teflon electrets; charge spreading; corona charged film; electric field profiles; electron beam charged film; electron beam deposited charge layers; piezoelectrically generated pressure steps; polytetrafluorethylene; retrapping efficiency; surface charge layer; thermally treated Teflon PTFE; Corona; Dielectrics; Electrets; Electrodes; Heating; Physics; Piezoelectric films; Surface charging; Temperature measurement; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0565-5
DOI :
10.1109/CEIDP.1992.283248
