Preparation and characterisation of cobalt and cobalt-zinc ferrites for magnetorheological materials

Keywords: Cobalt ferrite, Cobalt-zinc ferrite, Magnetorheological materials

Abstract

           The aim of this study was to study the structure, morphology, magnetic, and magnetorheological properties of cobalt and cobalt-zinc ferrite powders to be used as a functional component of magnetorheological fluids.
           Ferrites of cobalt CoFe2O4 and cobalt-zinc Co0.65Zn0.35Fe2O4 were obtained by combined hydrolysis of inorganic metal salt in aqueous solutions followed by thermal treatment of the precipitates. The ferrites were studied by means of X-ray phase analysis, scanning electron microscopy, IR spectroscopy, and magnetometry.
         The synthesised ferrites are polydispersed powders with the size of primary particles of 300–400 nm and the size of the coherent scattering regions of 22–33 nm. They demonstrate a high shear stress in  magnetorheological suspensions, which is 2.5 times higher than that of the nanosized particles. High-temperature annealing results in a significant increase in the specific magnetisation of the powders, as well as the shear stress in suspensions prepared on their basis. Doping cobalt ferrite with zinc leads to an increase in the specific magnetisation and rheological characteristics.
          The studied materials have a high shear stress in suspensions (~ 2.5 kPa at 650 mT) and can be used as functional fillers for magnetorheological materials.

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Author Biographies

Yulyan S. Haiduk, Belarusian State University, 4 Nezavisimosty pr., Minsk 220030, Belarus

PhD in Chemistry, Senior Researcher, Belarusian State University (Minsk, Belarus).

Evguenia V. Korobko, A. V. Luikov Heat and Mass Transfer Institute of NAS of Belarus, 15 P. Brovki ul., Minsk 220072, Belarus

DSc in Technical Sciences, Professor, Head of Laboratory, A. V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus (Minsk, Belarus).

Dzmitry A. Kotsikau, Belarusian State University, 4 Nezavisimosty pr., Minsk 220030, Belarus

PhD in Chemistry, Associate Professor, Belarusian State University (Minsk, Belarus).

Ivan A. Svito, Belarusian State University, 4 Nezavisimosty pr., Minsk 220030, Belarus

PhD in Physics and Mathematics, Senior Researcher, Belarusian State University (Minsk, Belarus).

Alexandra E. Usenka, Belarusian State University, 4 Nezavisimosty pr., Minsk 220030, Belarus

PhD in Chemistry, Associate Professor, Department of Physical Chemistry, Belarusian State University (Minsk, Belarus).

Vladimir V. Pankov, Belarusian State University, 4 Nezavisimosty pr., Minsk 220030, Belarus

DSc in Chemistry, Professor, Head of the Department of Physical Chemistry, Belarusian State University (Minsk, Belarus).

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Published
2022-03-15
How to Cite
Haiduk, Y. S., Korobko, E. V., Kotsikau, D. A., Svito, I. A., Usenka, A. E., & Pankov, V. V. (2022). Preparation and characterisation of cobalt and cobalt-zinc ferrites for magnetorheological materials. Condensed Matter and Interphases, 24(1), 19-28. https://doi.org/10.17308/kcmf.2022.24/9051
Section
Original articles