Electrocapacitive Properties of Cathode Materials Based on Na3Fe2(PO4)3 Polycrystals Synthesized by Solid-phase and Melt-quenching Methods
Nogai A.A. Nogai E.A. Akimbaeva D.D. Nogai A.S. Bush A.A. Tatkeeva G.G. Uskenbaev D.E.
2025L.N. Gumilyov Eurasian National University
Eurasian Journal of Physics and Functional Materials
2025#9Issue 2104 - 109 pp.
The article provides a comparative assessment of the influence of solid-phase and melt-quenching synthesis methods on the structures and electrochemical properties of Na3Fe2(PO4)3 polycrystals. Solid-phase synthesis of Na3Fe2(PO4)3 polycrystals (1 type of sample) is carried out by a two-stage method according to ceramic technology. In the case of the melt-quenching method of synthesis, firstly, glassy precursors are obtained by melting initial materials under the influence of IR radiation energy and quenching, and after their grinding, pressing, and firing, polycrystals of Na3Fe2(PO4)3 (2nd type of samples) are obtained. In the melt-quenching method, the precursors are obtained under sharp temperature-gradient conditions, and the synthesis of polycrystals occurs rapidly, so the resulting compression strains partially reduce the monoclinic distortions of a-Na3Fe2(PO4)3 structures. Moreover, the degree of crystallinity of type 2 polycrystals is higher than that of type 1 samples. The cathodic electrochemical properties of type 2 samples are found to be significantly higher compared to type 1 samples due to the higher degree of crystallinity and greater symmetry of the a-Na3Fe2(PO4)3 crystal structure. 2616-8537/
Electrical capacitance parameters , Melt-quenching of synthesis , Polycrystals , Solid-phase synthesis , Structural parameters
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S. Seifullin Kazakh Agrotechnical Research University, Astana, Kazakhstan
Russian Technological University MIREA, Moscow, Russian Federation
S. Seifullin Kazakh Agrotechnical Research University
Russian Technological University MIREA
10 лет помогаем публиковать статьи Международный издатель
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