¹Kyiv National University of Technologies and Design,
2, Nemirovich-Danchenko str., 01011 Kyiv, Ukraine
²National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
37, prospect Peremohy, 03056 Kyiv, Ukraine
³Institute of Physics, NAS of Ukraine
46, prospect Nauky, 03680 Kyiv, Ukraine
⁵Uzhhorod National University, 46, Pidgirna str., 88000 Uzhhorod, Ukraine
⁵V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine
41, prospect Nauky, 03680 Kyiv, Ukraine
⁶Institute of Experimental Physics, Slovak Academy of Sciences
47, Watsonova str., 04001 Košice, Slovakia
⁷Dr. K C Patel Research & Development Centre, Charotar University of Science & Technology,
CHARSUAT campus, Changa-388421, Gujarat, India
*Corresponding author e-mail: akoval@knutd.com.ua

Abstract. The influence of two types of nano-impurities MF1 and MF2 on the dielectric properties of Shell oil transformer oil at the temperature 293 K has been studied. It has been shown that these magnetic impurities have no significant effect on the dielectric permittivity value of Shell oil, but more significantly increase its conductivity, in so doing, the impurity MF1 increases the conductivity of transformer oil 4 times larger than the impurity MF2. It has been ascertained that the low-frequency dielectric relaxation appearing in the studied samples can be described by the Cole–Cole equation. The parameters of this relaxation process and the influence of different types of magnetic impurities on them have been estimated.

Keywords: dielectric spectroscopy, dielectric relaxation, the Cole–Cole equation, magnetic nanoimpurities, dielectric properties.

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