Figure 2 | Scientific Reports

Figure 2

From: “Thermal Stabilization Effect” of Al2O3 nano-dopants improves the high-temperature dielectric performance of polyimide

Figure 2

Space charge distribution (measured by PEA method) of long term corona-aged pure PI and PI/Al2O3 nanocomposite films under polarization electric field of 20 kV/mm for 2 hours.

The samples are treated under high-frequency high-voltage pulse at different temperatures: (a) Pure PI films corona-aged at 80 °C. (b) Pure PI films corona-aged at 160 °C. (c) 2 wt% nanocomposite films corona-aged at 80 °C. (d) 2 wt% nanocomposite films corona-aged at 160 °C.

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