DC and AC dielectric properties transformer oil based magnetic fluid

摘要

The development of electric breakdown in magnetic fluids (MFs) has been analyzed. MFs have been consisted of magnetic particles (Fe3O4) of nanometric size, coated with oleic acid as a surfactant, dispersed in transformer oil. The electro physical processes, which appear at action of the DC and AC electric field and constant magnetic field on MFs, were observed. These processes have effect on electric breakdown.