Title :
The excellent charge storage stability of porous polytetrafluoroethylene (PTFE) film electrets
Author :
Zhongfu, XIA ; Wedel, A. ; Danz, R.
Author_Institution :
Pohl Inst. of Solid State Phys., Tongji Univ., Shanghai, China
Abstract :
The excellent charge storage stability both for negatively and positively corona charged porous polytetrafluoroethylene (PTFE) was studied by the isothermal surface potential decay measurements after constant voltage corona charging at room and elevated temperatures. The corona charged samples were aged at different temperatures and open-circuit Thermally Stimulated Discharge (TSD) experiments carried out. The comparison of the charge storage stability was investigated among porous PTFE, solid PTFE and Teflon FEP electrets. Their charge lifetimes were estimated by means of isothermal depolarization program in the several selected temperatures
Keywords :
dielectric polarisation; electrets; polymer films; porous materials; surface potential; thermally stimulated currents; PTFE; charge lifetimes; charge storage stability; constant voltage corona charging; isothermal depolarization program; isothermal surface potential decay measurements; open-circuit Thermally Stimulated Discharge; porous polytetrafluoroethylene film electrets; Aging; Charge measurement; Corona; Current measurement; Isothermal processes; Stability; Surface charging; Surface discharges; Temperature; Voltage measurement;
Conference_Titel :
Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on
Conference_Location :
Athens
Print_ISBN :
0-7803-5025-1
DOI :
10.1109/ISE.1999.831812
