Influence of TiO₂ and SiO₂ Nanoparticles on the Dielectric Properties and Breakdown Voltage of Blended Oil

This study examines the effect of TiO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> and SiO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> nanoparticles on the dielectric properties of a blended oil composed of 80% mineral oil and 20% synthetic ester. A stable nanofluid was formulated by incorporating a surfactant. By incorporating Tio<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> nanoparticles, the dielectric constant, dielectric loss constant, Conductivity, and Polarization current increase. The dielectric constant increases with the addition of SiO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> nanoparticles, while the dielectric loss constant, Conductivity, and Polarization current decrease. Adding Cetyl Trimethyl Ammonium Bromide (CTAB) with SiO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> nanoparticles increases the dielectric constant, dielectric loss constant, Conductivity, and polarization current, indicating that CTAB influences the behaviour of SiO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> in oil. The AC breakdown voltage increases significantly, with TiO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> based nanofluid showing a 21.7% rise and SiO<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> based nanofluid a 16.5% rise. These improvements demonstrate the potential of nanoparticles to enhance the electrical properties of blended oils for insulation applications.