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Thermally activated sodium-ion transport and optical properties of NaBa(PO3)3 for high-temperature electronics and energy storage applications.

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Title: Thermally activated sodium-ion transport and optical properties of NaBa(PO3)3 for high-temperature electronics and energy storage applications.
Authors: Karray, M.1 (AUTHOR), Bouzayani, Mohamed Mounir2 (AUTHOR), Nasri, S.1,3 (AUTHOR) nasri.saber.1@gmail.com, Marzougi, H.4,5 (AUTHOR), Elghmaz, E. A.6 (AUTHOR), Ghzaiel, M. B.1,7 (AUTHOR), Oueslati, A.1 (AUTHOR)
Source: Journal of Materials Science: Materials in Electronics. Apr2026, Vol. 37 Issue 12, p1-23. 23p.
Abstract: This study examines the structural, optical, and electrical properties of NaBa(PO3)3 to evaluate its potential in solid-state ionic devices. Phase-pure NaBa(PO3)3 was synthesized by a high-temperature solid-state reaction and characterized using XRD, FTIR, UV–Vis, and AC impedance spectroscopy. Rietveld refinement confirmed the formation of an orthorhombic P212121 structure. The material exhibits a wide optical band gap and thermally activated Na+ conduction consistent with polaron hopping, highlighting its potential for high-temperature ionic and dielectric applications. Impedance and modulus analyses reveal non-Debye relaxation and distinct grain and grain-boundary contributions. Its negative temperature coefficient of resistivity and high sensitivity index highlight strong potential for high-temperature thermistor and solid-state electrolyte applications. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:This study examines the structural, optical, and electrical properties of NaBa(PO3)3 to evaluate its potential in solid-state ionic devices. Phase-pure NaBa(PO3)3 was synthesized by a high-temperature solid-state reaction and characterized using XRD, FTIR, UV–Vis, and AC impedance spectroscopy. Rietveld refinement confirmed the formation of an orthorhombic P212121 structure. The material exhibits a wide optical band gap and thermally activated Na+ conduction consistent with polaron hopping, highlighting its potential for high-temperature ionic and dielectric applications. Impedance and modulus analyses reveal non-Debye relaxation and distinct grain and grain-boundary contributions. Its negative temperature coefficient of resistivity and high sensitivity index highlight strong potential for high-temperature thermistor and solid-state electrolyte applications. [ABSTRACT FROM AUTHOR]
ISSN:09574522
DOI:10.1007/s10854-026-17266-0