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Synthesis and Properties of Ferrite-Based Nanoparticles

1
Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan
2
Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty 050032, Kazakhstan
3
Laboratory of Additive Technologies, Kazakh-Russian International University, Aktobe 030006, Kazakhstan
4
Department of Intelligent Information Technologies, Ural Federal University, Yekaterinburg 620075, Russia
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(8), 1079; https://doi.org/10.3390/nano9081079
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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Abstract

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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MDPI and ACS Style

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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