Journal of the Serbian Chemical Society 2015 Volume 80, Issue 2, Pages: 197-207
https://doi.org/10.2298/JSC200814104M
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Correlation between morphology and magnetic properties of electrochemically produced cobalt powder particles
Maksimović Vesna M.
(Institute of Nuclear Sciences, “Vinča”, Belgrade)
Nikolić Nebojša D.
(ICTM - Institute of Electrochemistry, Belgrade)
Kusigerski Vladan B.
(Institute of Nuclear Sciences, “Vinča”, Belgrade)
Blanuša Jovan L.
(Institute of Nuclear Sciences, “Vinča”, Belgrade)
Cobalt 3D powder particles were successfully prepared by the galvanostatic
electrodeposition. Electrodeposited cobalt powder were characterized by X-ray
diffraction (XRD), scanning electron microscope (SEM), Energy Dispersive
Spectroscopy (EDS) analysis and SQUID magnetometry. It has been shown that
morphology, structure and magnetic properties of cobalt particles are closely
associated and can be easily controlled by adjusting process parameters of
electrodeposition. Morphology of cobalt powder particles is strongly affected
by hydrogen evolution reaction as a parallel reaction to cobalt
electrodeposition. Depending on the applied current density, the two types of
powder particles were formed: dendrites at lower and spongy-like particles at
higher current densities. Morphologies and structures of powder particles are
correlated with their magnetic properties, and compared with those of the
bulk cobalt. In comparison with the properties of bulk cobalt, the obtained
3D structures exhibited a decreased saturation magnetization (MS), but an
enhanced coercivity (HC) which is explained by their peculiar morphology.
Keywords: electrodeposition, cobalt, powder, scanning electron microscope (SEM), X-ray diffraction (XRD) analysis, magnetic properties
Projekat Ministarstva nauke Republike Srbije, br. III 45012