In uence of Magnetic Field on Dielectric Breakdown in Transformer Oil Based Ferro uids

In this paper the experimental study of the breakdown eld strength in a transformer oil based ferro uid is reported. The experiments are conducted on ve ferro uid samples with di erent magnetic volume fraction. The in uence of external magnetic eld on the breakdown eld strength is investigated, when a quasi-homogenous magnetic eld was applied in parallel and perpendicular con guration in regard to the electric eld. The obtained results are analysed in accordance to the electron charging of ferro uid nanoparticles theory.