Dielectric strength of hexafluoropropylene (C3F6)

The dielectric strength of hexafluoropropylene has been investigated under breakdown and prebreakdown conditions in the pressure range from 0.07 to 2 bar. Breakdown voltages measured in a uniform field gap have been found to be in good agreement with intrinsic dielectric strength evaluated from measurements of net ionisation data. The results show that the Paschen rule cannot be applied to this gas-the dielectric strength (E/p)0 exhibits a marked increase with gas pressure at constant products of pressure times distance (pd).