Defect control and ionic conductivity of oxynitride perovskite Sr0.83Li0.17Ta0.83O1.88N0.74

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dc.contributor.authorKim, YIen_AU
dc.contributor.authorAvdeev, Men_AU
dc.date.accessioned2024-05-15T06:51:52Zen_AU
dc.date.available2024-05-15T06:51:52Zen_AU
dc.date.issued2022-01en_AU
dc.date.statistics2024-04-23en_AU
dc.description.abstractPerovskite lattice was tailored by introducing site vacancies and mixed anion composition, to produce Sr0.83Li0.17Ta0.83O1.88N0.74 (Li02N). Further, Li02N was converted to a defect oxide Sr0.83Li0.17Ta0.83O3 (Li02O) by applying an optimized treatment: heating in air at 1173 K for 2 h. According to the neutron Rietveld refinement, Li02N and Li02O are tetragonal and orthorhombic, respectively, where the lattice volume of Li02O is significantly smaller than that of Li02N. The ionic conductivity (σion) of Li02N and Li02O was evaluated by the ac impedance spectroscopy and the equivalent circuit analysis. Both Li02N (σion = 10−5.5 S/cm at 671 K) and Li02O (σion = 10−6.2 S/cm at 667 K) exhibited an Arrhenius behavior of ionic conductivity with activation energies of 0.87 eV and 0.75 eV, respectively. It is interpreted that the nitride component enhances the ionic conduction of Li02N, while the vacancy of the anion lattice makes an opposite effect. © 2021 Elsevier Ltd and Techna Group S.r.l.en_AU
dc.identifier.citationKim, Y.-I., & Avdeev, M. (2022). Defect control and ionic conductivity of oxynitride perovskite Sr0.83Li0.17Ta0.83O1.88N0.74. Ceramics International, 48(2), 1765-1770. doi.org/10.1016/j.ceramint.2021.09.256en_AU
dc.identifier.issn0272-8842en_AU
dc.identifier.issue2en_AU
dc.identifier.journaltitleCeramics Internationalen_AU
dc.identifier.pagination1765-1770en_AU
dc.identifier.urihttps://doi.org/10.1016/j.ceramint.2021.09.256en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15606en_AU
dc.identifier.volume48en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPerovskiteen_AU
dc.subjectIonic conductivityen_AU
dc.subjectOxidesen_AU
dc.subjectActivation energyen_AU
dc.subjectNitridesen_AU
dc.subjectAlkali metalsen_AU
dc.titleDefect control and ionic conductivity of oxynitride perovskite Sr0.83Li0.17Ta0.83O1.88N0.74en_AU
dc.typeJournal Articleen_AU
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