Features of Structures and Ionic Conductivity of Na3Fe2(PO4)3 Polycrystals Obtained by Solid Phase and Melt Methods
Nogai A.S. Nogai A.A. Uskenbaev D.E. Utegulov A.B. Nogai E.A. Toleugulov D.D.
December 2023Multidisciplinary Digital Publishing Institute (MDPI)
Ceramics
2023#6Issue 42295 - 2306 pp.
This article investigates the structures and conductive properties of polycrystals of Na3Fe2(PO4)3 obtained by solid-state and melt synthesis methods using concentrated optical radiation. It has been established that in the melt synthesis method, the material is synthesized under significantly non-equilibrium thermodynamic conditions, leading to the creation of deformations in the sample, which contribute to the enhancement of ionic conductivity. Additionally, the synthesis duration is reduced by half. Through a comparative assessment of the structural parameters and conductive properties of these materials, it is demonstrated that polycrystals obtained by the melt method exhibit better texture and higher ionic conductivity. The occurrence of deformations during the synthesis of α-Na3Fe2(PO4)3 under high temperature-gradient conditions indicates the elasticity of the crystalline framework {[Fe2(PO4)]3−}3∞. It is concluded that the non-equilibrium thermodynamic conditions of α-Na3Fe2(PO4)3 synthesis promote the formation of deformations in the crystalline structure of polycrystals, leading to a partial increase in symmetry and ionic conductivity.
ionic conductivity , melt synthesis method , polycrystalline grains , polycrystals , solid-state synthesis , structural parameters
Text of the article Перейти на текст статьи
Department of Radio Engineering, Electronics and Telecommunications, Energy Faculty, S. Seifullin Kazakh Agrotechnical Research University, Astana, 010011, Kazakhstan
Department of Radio Engineering
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026