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Technical Physics

, Volume 63, Issue 12, pp 1814–1819 | Cite as

Effect of the Voltage Pulse Front Steepness on the Electric Strength of Polymers

  • V. A. Zakrevskii
  • V. A. Pakhotin
  • N. T. Sudar’Email author
PHYSICAL SCIENCE OF MATERIALS
  • 3 Downloads

Abstract

We have studied the effect of the leading edge steepness of a high-voltage pulse front on the dielectric strength of 3-μm-thick polyethylene terephthalate film. It is found that its breakdown electric field strength increases logarithmically from 550 to 700 MV/m upon an increase in the voltage growth rate (pulse front steepness) from 2 to 70 GV/s. It is shown that the experimental data can be described using the concept of the ionization mechanism of polymer breakdown, which is not associated with the evolution of impact ionization in polymers, and accounting for the decrease in the overvoltage coefficient in a polymer dielectric upon an increase in the pulse front steepness.

Notes

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • V. A. Zakrevskii
    • 1
  • V. A. Pakhotin
    • 1
  • N. T. Sudar’
    • 2
    Email author
  1. 1.Ioffe InstituteSt. PetersburgRussia
  2. 2.Peter the Great St. Petersburg Polytechnic UniversitySt. PetersburgRussia

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