Activation energy of DC conductivity of high moisture content electrical pressboard impregnated with mineral oil of natural origin NYNAS NYTRO BIO300X

Abstract

The paper presents the results of testing the polarization currents and DC conductivity of electrical pressboard produced by Weidman company, containing water nanoparticles with content of 4 wt. % and impregnated with mineral oil of natural origin NYNAS NYTRO BIO 300X. The time dependence of polarization currents and DC conductivity was determined for measurement temperatures in the range of 20 - 70°C. Arrhenius plot was prepared for 6 temperatures from the whole range of measurement temperatures. Linear approximations of the experimental results were made on the Arrhenius plot. The activation energy of the DC conductivity and the values of the coefficient of determination R <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> were determined. The values of the coefficient of determination close to unity testify to the high accuracy of the measurements and the stability of the temperature. It was found that the value of the activation energy of the conductivity for the pressboard impregnated with mineral oil of natural origin NYNAS NYTRO BIO 300X is ΔE = 1.117 eV.