Dielectric breakdown study of a nanofluid based on goethite nanoparticles

The study of electric breakdown in magnetic nanofluid is one of the basic characterizations from the dielectric point of view. In this article we put effort to study dielectric breakdown strength of the transformer oil doped with goethite rod-shape nanoparticles. We use oscilloscope technique to catch the breakdown value for DC and AC applied potential, respectively. The investigated sample was exposed to both, DC and AC electric potential. We point out that for DC dielectric strength there is a positive influence of goethite nanorods on dielectric strength till electrode gap doesn't exceed critical value. Otherwise, for AC electric potential there was practically no effect on dielectric strength of the investigated nanofluid. In the result and discussion we present more complex description of the measured data. We also provide information about preparation processes of the fluid and detailed description of the measurement setup.