Electric-displacement profile in a 25-µm thick Teflon™-TFE film negatively corona-charged for 1 (dashed line) or 60 min (solid line);
VP = -20 kV; TC = 25°C; rmax » 240 C/m3.
Electric-displacement profile in a 25-µm thick Teflon™-TFE film negatively corona-charged at VP = -15 kV; TC = 200°C; tC = 60 min;
rmax » 200 C/m3;.