Open AccessStudy of the Electrical Conductivity of Magnetic Fluids
Author(s) -
A.I. Zhakin,
A. E. Kuziko,
A. P. Kuzmenko,
Myo Min Than
Publication year - 2022
Publication title -
èlektronnaâ obrabotka materialov
Language(s) - English
Resource type - Journals
eISSN - 2345-1718
pISSN - 0013-5739
DOI - 10.52577/eom.2022.58.1.41
Subject(s) - conductivity , electrode , magnetic nanoparticles , dissociation (chemistry) , materials science , electrical resistivity and conductivity , electrical conductor , magnetic field , molecule , electrochemistry , nanoparticle , chemical physics , chemical engineering , nanotechnology , chemistry , composite material , organic chemistry , physics , engineering , quantum mechanics , electrical engineering
The effects of electrical conductivity of magnetic fluids (MFls) are investigated both in the presence and in the absence of an external magnetic field (MF). It is shown that in MFls based on magnetite (Fe3O4) magnetic nanoparticles (MNPs) coated with the surfactant – oleic acid (OA), conductive ions are formed by OA molecules in both dissociation and electro-chemical processes. The decisive role of electrochemical reactions of OA molecules on the surface of chemically active Cu electrodes, which form injection conductivity, has been proved.The analysis of the anisotropy of the MFl electrical conductivity in an external MF with chemically active and silent electrodes is given. An interpretation is present-ed ofnonstationary ionic processes in the near-electrode layers which de-termine the kinetics of MNPs and autowaves in thin layers of MFLs.