Nogai, A.S.; Nogai, A.A.; Uskenbaev, D.E.; Utegulov, A.B.; Nogai, E.A.; Toleugulov, D.D. Features of Structures and Ionic Conductivity of Na3Fe2(PO4)3 Polycrystals Obtained by Solid Phase and Melt Methods. Ceramics2023, 6, 2295-2306.
Nogai, A.S.; Nogai, A.A.; Uskenbaev, D.E.; Utegulov, A.B.; Nogai, E.A.; Toleugulov, D.D. Features of Structures and Ionic Conductivity of Na3Fe2(PO4)3 Polycrystals Obtained by Solid Phase and Melt Methods. Ceramics 2023, 6, 2295-2306.
Nogai, A.S.; Nogai, A.A.; Uskenbaev, D.E.; Utegulov, A.B.; Nogai, E.A.; Toleugulov, D.D. Features of Structures and Ionic Conductivity of Na3Fe2(PO4)3 Polycrystals Obtained by Solid Phase and Melt Methods. Ceramics2023, 6, 2295-2306.
Nogai, A.S.; Nogai, A.A.; Uskenbaev, D.E.; Utegulov, A.B.; Nogai, E.A.; Toleugulov, D.D. Features of Structures and Ionic Conductivity of Na3Fe2(PO4)3 Polycrystals Obtained by Solid Phase and Melt Methods. Ceramics 2023, 6, 2295-2306.
Abstract
This article presents the results of studies of the structure and conductive properties of Na3Fe2(PO4)3 polycrystals synthesized by solid-phase and melt (using concentrated optical radiation) methods. It has been established that with the melt method, the synthesis of the material occurs under significantly nonequilibrium temperature-gradient conditions, which leads to the creation of deformations in the sample that contribute to an increase in ionic conductivity. The ability of the Na3Fe2(PO4)3 structure to adapt to anomalous deformations that occur under temperature-gradient conditions indicates the elasticity of the crystalline framework {[Fe2(PO4)]3-}3∞. Through a comparative assessment of the structural parameters and conductive properties of these materials, it is shown that polycrystals obtained by the melt method have a better texture and greater ionic conductivity. The advantage of this method is that the duration of the synthesis of α-Na3Fe2(PO4)3 is halved. It is concluded that this method is applicable to obtain effective polycrystals of other compositions.
Chemistry and Materials Science, Ceramics and Composites
Copyright:
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