Enhanced electrical and energy storage performances of Fe, Sb co-doped BNBCTS ceramics synthesized via the solid-state combustion technique

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dc.contributor.authorKornphom, C.
dc.contributor.authorSaenkam, K.
dc.contributor.authorYotthuan, S.
dc.contributor.authorVittayakorn, N.
dc.contributor.authorBongkarn, T.
dc.date.accessioned2026-08-06T10:47:54Z
dc.date.available2026-08-06T10:47:54Z
dc.date.issued2024-12-01
dc.description.abstractIn this study BNBCTS ceramics were co-doped with Fe and Sb to form (Bi<inf>0.5</inf>Na<inf>0.5</inf>)<inf>0.93</inf>(Ba<inf>0.945</inf>Ca<inf>0.055</inf>)<inf>0.07</inf>(Ti<inf>(0.9946-x)</inf>Sn<inf>0.0054</inf>)(Fe<inf>0.5</inf>Sb<inf>0.5</inf>)<inf>x</inf>O<inf>3</inf> ceramics (denoted as BNBCTS-xFS) with various x content and were prepared via the solid-state combustion technique to enhance the electrical and energy storage performance. The effect of co-doping Fe and Sb on the phase formation, defect dipole, microstructure, electrical and energy storage properties of BNBCTS-xFS ceramics was studied. When x content increased from 0.0 to 0.030, the amount of the rhombohedral (R) phase decreased from 51 to 24 % while the tetragonal (T) phase increased from 49 to 76 %. The increased Fe and Sb content increased the defect dipole of singly/doubly charged oxygen-vacancies (V<inf>O</inf><sup>∙</sup>/ V<inf>O</inf><sup>∙∙</sup>) and caused more Ti<sup>4+</sup> to transition to Ti<sup>3+</sup>, which caused the transition temperature of the ferroelectric phase to relaxor state (T<inf>F-R</inf>) in the ceramics to drop to below room temperature and it exhibited relaxor characteristics at room temperature. The ceramic with an x content of 0.010 had the largest grain size (3.06 μm), excellence ferroelectric properties (P<inf>r</inf> ∼31.04 μC/cm<sup>2</sup>, P<inf>m</inf> ∼38.98 μC/cm<sup>2</sup> and E<inf>c</inf> ∼18.28 kV/cm), the largest electro strain (∼0.175 %) and a large d<inf>33</inf><sup>*</sup> of 350 pm/V. Moreover, when x = 0.020, the ergodic relaxor ceramic showed the smallest grain size (1.03 μm), the lowest remanant polarization (P<inf>r</inf>) of 4.52 μC/cm<sup>2</sup> and the lowest coercive field (E<inf>c</inf>) of 8.37 kV/cm, at an electric field of 60 kV/cm. More importantly, energy storage properties at the electric breakdown strength (E<inf>b</inf> = 120 kV/cm) of the ceramics with an x content of 0.020 exhibited a recoverable energy storage density (W<inf>rec</inf>) of 1.81 J/cm<sup>3</sup>, a total energy storage density (W<inf>total</inf>) of 2.95 J/cm<sup>3</sup> and an efficiency (η) of 61.30%, with excellent thermal (∼25–150 °C) and frequency stability (∼1–100 Hz). This study provides new insights into the modulation of BNBCTS ceramics with Fe and Sb co-doping, which could effectively improve the electrical properties and energy storage properties of BNBCTS-xFS ceramics.
dc.identifier.citationCeramics International, 50(23), 51789-51803, 2024
dc.identifier.doi10.1016/j.ceramint.2024.02.203
dc.identifier.issn02728842
dc.identifier.other2-s2.0-85187995943
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/16104
dc.sourceCeramics International
dc.subjectBNT-based ceramics
dc.subjectEnergy storage
dc.subjectOxygen vacancy
dc.subjectPhase formation
dc.subjectPiezoelectric
dc.titleEnhanced electrical and energy storage performances of Fe, Sb co-doped BNBCTS ceramics synthesized via the solid-state combustion technique
dc.typeArticle

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