RADIATION-THERMAL METHOD FOR LITHIUM-ZINC FERRITE CERAMICS MANUFACTURING
Abstract
The structural and magnetic properties of lithium-zinc ferrite ceramics of Li0.4Fe2.4Zn0.2O4 composition, which was obtained under complex high-energy action based on the use of mechanical activation of Fe2O3-Li2CO3-ZnO initial reagents mixture in AGO-2C planetary mill and subsequent its heating to a sintering temperature of 1050 °C for 140 min by ELV-6 continuous electrons beam with an electron energy of 1.4 MeV, were investigated. X-ray phase analysis showed a broadening of diffraction peaks due to the decrease in the crystallite sizes and the increase in the values of microdeformation as a result of mechanical milling. It was established that preliminary mechanical activation of the initial reagents mixture in a planetary mill allows not only to accelerate the synthesis of ferrite materials, but also to combine the both technological stages of synthesis and sintering in one stage of radiation-thermal treatment, consisting in a heating of press-billets by a high-energy electron beam to a sintering temperature. Lithium-zinc ferrite ceramics, obtained by the radiation-thermal method, is characterized by high density and low porosity as well as high values of the specific magnetization and the Curie temperature.
Forcitation:
Lysenko E.N., Surzhikov A.P., Malyshev A.V., Vlasov V.A., Nikolaev E.V. Radiation-thermal method for lithium-zinc ferrite ceramics. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 6. P. 69-75
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