Solid-Phase Formation of Li-Zn Ferrite under High-Energy Impact

Abstract:

The effect of complex high-energy action, including mechanical milling of Li₂CO₃-Fe₂O₃-ZnO initial reagents mixture and its consistent heating by the pulsed electron beam on solid-phase synthesis was studied by X-ray powder diffraction and thermal analyses. The initial mixture Li₂CO₃-Fe₂O₃-ZnO corresponds to the ferrite with stoichiometric formula: Li_0.5(1–x)Zn_xFe_2.5–0.5xО₄, where х = 0.2. The same studies were carried out with thermal heating in a laboratory furnace for detection the effect of radiation on the formation of phase composition lithium-zinc ferrite. Initial mixture was milled in AGO-2S planetary ball mill with a milling speed of 2220 rpm for 60 min. Radiation-thermal synthesis of the milled mixture was carried out by the pulsed electron accelerator (ILU-6) at 600°C and 750°C. The maximum time of the isothermal stage was 60 minutes. According to the X-ray powder diffraction and thermogravimetric analysis, it was found that the complex high-energy action leads to decrease a temperature and time of obtaining lithium-zinc ferrite homogeneous in phase composition. The proposed high-energy regimes allow to synthesized lithium-zinc ferrites at 600 °C for 60 minutes, which is much lower compared to conventional ceramic technology.

• Periodical: Materials Science Forum (Volume 970)
• Pages: 250-256
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.970.250
• Online since: September 2019
• Authors: Evgeniy Nikolaev*, Elena Nikolaevna Lysenko, Anatoly P. Surzhikov
• Keywords: Impulse Electron Beam, Lithium Ferrites, Mechanical Milling, Thermal Analysis, X-Ray Powder Diffraction

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