Kodumudi Venkataraman, Lalitha (2023)
Influence of Quenching and Subsequent Annealing on the Conductivity and Electromechanical Properties of Na₁/₂Bi₁/₂TiO₃-BaTiO₃.
In: Materials, 2021, 14 (9)
doi: 10.26083/tuprints-00019577
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
Na₁/₂Bi₁/₂TiO₃-based materials have gained considerable attention for their potential to exhibit giant strain, very-high ionic conductivity comparable to yttria stabilized zirconia or high mechanical quality factor for use in high power ultrasonics. In recent times, quenching Na₁/₂Bi₁/₂TiO₃-based compositions have been demonstrated to enhance the thermal depolarization temperature, thus increasing the operational temperature limit of these materials in application. This work investigates the role of quenching-induced changes in the defect chemistry on the dielectric, ferroelectric and piezoelectric properties of quenched Na₁/₂Bi₁/₂TiO₃-BaTiO₃.The quenched samples indeed demonstrate an increase in the bulk conductivity. Nevertheless, while subsequent annealing of the quenched samples in air/oxygen atmosphere reverts back the depolarization behaviour to that of a furnace cooled specimen, the bulk conductivity remains majorly unaltered. This implies a weak correlation between the defect chemistry and enhanced thermal stability of the piezoelectric properties and hints towards other mechanisms at play. The minor role of oxygen vacancies is further reinforced by the negligible (10–15%) changes in the mechanical quality factor and hysteresis loss.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Kodumudi Venkataraman, Lalitha |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Influence of Quenching and Subsequent Annealing on the Conductivity and Electromechanical Properties of Na₁/₂Bi₁/₂TiO₃-BaTiO₃ |
| Sprache: | Englisch |
| Publikationsjahr: | 28 November 2023 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2021 |
| Ort der Erstveröffentlichung: | Basel |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials |
| Jahrgang/Volume einer Zeitschrift: | 14 |
| (Heft-)Nummer: | 9 |
| Kollation: | 15 Seiten |
| DOI: | 10.26083/tuprints-00019577 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/19577 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Na₁/₂Bi₁/₂TiO₃-based materials have gained considerable attention for their potential to exhibit giant strain, very-high ionic conductivity comparable to yttria stabilized zirconia or high mechanical quality factor for use in high power ultrasonics. In recent times, quenching Na₁/₂Bi₁/₂TiO₃-based compositions have been demonstrated to enhance the thermal depolarization temperature, thus increasing the operational temperature limit of these materials in application. This work investigates the role of quenching-induced changes in the defect chemistry on the dielectric, ferroelectric and piezoelectric properties of quenched Na₁/₂Bi₁/₂TiO₃-BaTiO₃.The quenched samples indeed demonstrate an increase in the bulk conductivity. Nevertheless, while subsequent annealing of the quenched samples in air/oxygen atmosphere reverts back the depolarization behaviour to that of a furnace cooled specimen, the bulk conductivity remains majorly unaltered. This implies a weak correlation between the defect chemistry and enhanced thermal stability of the piezoelectric properties and hints towards other mechanisms at play. The minor role of oxygen vacancies is further reinforced by the negligible (10–15%) changes in the mechanical quality factor and hysteresis loss. |
| Freie Schlagworte: | lead-free piezoceramics, quenching, Na₁/₂Bi₁/₂TiO₃, oxygen vacancies, thermal depolarization |
| ID-Nummer: | 2149 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-195775 |
| Zusätzliche Informationen: | This article belongs to the Special Issue Piezoelectric Ceramics: From Fundamentals to Applications |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 28 Nov 2023 13:46 |
| Letzte Änderung: | 29 Nov 2023 10:33 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Influence of Quenching and Subsequent Annealing on the Conductivity and Electromechanical Properties of Na₁/₂Bi₁/₂TiO₃-BaTiO₃. (deposited 28 Nov 2023 13:46) [Gegenwärtig angezeigt]
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