Calculation Estimation of the Relative Permittivity of Nonmagnetic Conducting Materials under the Action of Variable Conduction Current

A special case of equality of the conduction current density and the displacement current density in a homogeneous nonmagnetic conducting medium was used to consider the results of approximate calculation estimation of the relative permittivity ε_r of nonmagnetic conducting materials (metals and alloys), which are extensively used in electrical power engineering, electric power industry, and high-voltage pulse technology under the influence of variable (pulsed) electric currents and electromagnetic fields (EMF) with various amplitude–time parameters. It was demonstrated that, in the investigated case, at low frequencies f₀ of conduction current and EMF (at a frequency on the order of 10² Hz) in the range of extremely low-frequency electromagnetic waves (EMW), the materials under consideration exhibit extremely high values of the electrophysical parameter ε_r (on the order of 10¹⁵). For extremely high frequencies f₀ of current and EMF (at a frequency on the order of 5 × 10¹³ Hz) in the infrared range of EMW, these conducting materials are characterized by ε_r values on the order of 10²–10⁴, and in terms of the electrophysical parameter ε_r, they approach solid dielectrics and ferroelectrics.