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Synthesis and Properties of Ferrite-Based Nanoparticles

Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan
Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty 050032, Kazakhstan
Laboratory of Additive Technologies, Kazakh-Russian International University, Aktobe 030006, Kazakhstan
Department of Intelligent Information Technologies, Ural Federal University, Yekaterinburg 620075, Russia
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(8), 1079;
Received: 5 July 2019 / Revised: 16 July 2019 / Accepted: 22 July 2019 / Published: 27 July 2019
(This article belongs to the Special Issue Functional Nanomagnetics and Magneto-Optical Nanomaterials)
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The work is dedicated to the study of the structural and optical characteristics, as well as the phase transformations, of ferrite nanoparticles of CeO2-Fe2O3. To characterize the results obtained, the methods of scanning and transmission microscopy, X-ray diffraction (XRD) spectroscopy, and Mössbauer spectroscopy were applied. It was found that the initial nanoparticles are polycrystalline structures based on cerium oxide with the presence of X-ray amorphous inclusions in the structure, which are characteristic of iron oxide. The study determined the dynamics of phase and structural transformations, as well as the appearance of a magnetic texture depending on the annealing temperature. According to the Mossbauer spectroscopy data, it has been established that a rise in the annealing temperature gives rise to an ordering of the magnetic properties and a decrease in the concentration of cationic and vacancy defects in the structure. During the life test of synthesized nanoparticles as cathode materials for lithium-ion batteries, the dependences of the cathode lifetime on the phase composition of nanoparticles were established. It is established that the appearance of a magnetic component in the structure result in a growth in the resource lifetime and the number of operating cycles. The results show the prospects of using these nanoparticles as the basis for lithium-ion batteries, and the simplicity of synthesis and the ability to control phase transformations opens up the possibility of scalable production of these nanoparticles for cathode materials. View Full-Text
Keywords: ferrite nanoparticles; crystal structure; phase transformations; magnetic structures; nanotechnologies ferrite nanoparticles; crystal structure; phase transformations; magnetic structures; nanotechnologies

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Kadyrzhanov, K.K.; Egizbek, K.; Kozlovskiy, A.L.; Zdorovets, M.V. Synthesis and Properties of Ferrite-Based Nanoparticles. Nanomaterials 2019, 9, 1079.

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