On the dielectric strength of synthetic electrical insulating materials

This paper reports the results of research aimed at finding a relationship between dielectric strength and other material properties. The variables investigated were dielectric constant, dissipation factor, volume resistivity and glass transition temperature. The “best fit” equation contained only the first three variables. This equation had a correlation coefficient of 0.87. It is proposed that this correlation could be improved if atomic ionization potentials and molecular free volumes were included as variables in the dielectric strength relationship.