Ren, Pengrong ; Wang, Jiale ; Yike, Wang ; Kodumudi Venkataraman, Lalitha ; Zhao, Gaoyang (2020)
Origin of enhanced depolarization temperature in quenched Na0.5Bi0.5TiO3-
BaTiO3 ceramics.
In: Journal of the European Ceramic Society, 40 (8)
doi: 10.1016/j.jeurceramsoc.2020.02.039
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Na0.5Bi0.5TiO3-BaTiO3 (NBT-BT)-based lead-free piezoelectric ceramics have been actively studied in recent years as a potential replacement for lead-based materials in ultrasonic applications. However, its relatively low thermal depolarization temperature (Td) is still an imperative obstacle hindering implementation in practical application. Recently, it was reported that quenching is an effective way to improve Td of NBT-based ceramics, but the essential mechanism is still unclear. In this study, 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 (NBT-6BT) ceramics were quenched in air and liquid nitrogen, and then annealed in oxygen and nitrogen atmospheres to explore the origin of enhanced depolarization temperature. The results from this study correlate the enhancement of Td to the residual stress, which induces a stable rhombohedral ferroelectric phase, thereby increasing the thermal depolarization temperature of NBT-6BT. Our results indicate that the residual stress is also an important factor influencing the electrical properties of quenched piezoelectric ceramics, which should be given more attention in future studies.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Ren, Pengrong ; Wang, Jiale ; Yike, Wang ; Kodumudi Venkataraman, Lalitha ; Zhao, Gaoyang |
| Art des Eintrags: | Bibliographie |
| Titel: | Origin of enhanced depolarization temperature in quenched Na0.5Bi0.5TiO3- BaTiO3 ceramics |
| Sprache: | Englisch |
| Publikationsjahr: | 18 Mai 2020 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 40 |
| (Heft-)Nummer: | 8 |
| DOI: | 10.1016/j.jeurceramsoc.2020.02.039 |
| URL / URN: | https://www.sciencedirect.com/science/article/abs/pii/S09552... |
| Kurzbeschreibung (Abstract): | Na0.5Bi0.5TiO3-BaTiO3 (NBT-BT)-based lead-free piezoelectric ceramics have been actively studied in recent years as a potential replacement for lead-based materials in ultrasonic applications. However, its relatively low thermal depolarization temperature (Td) is still an imperative obstacle hindering implementation in practical application. Recently, it was reported that quenching is an effective way to improve Td of NBT-based ceramics, but the essential mechanism is still unclear. In this study, 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 (NBT-6BT) ceramics were quenched in air and liquid nitrogen, and then annealed in oxygen and nitrogen atmospheres to explore the origin of enhanced depolarization temperature. The results from this study correlate the enhancement of Td to the residual stress, which induces a stable rhombohedral ferroelectric phase, thereby increasing the thermal depolarization temperature of NBT-6BT. Our results indicate that the residual stress is also an important factor influencing the electrical properties of quenched piezoelectric ceramics, which should be given more attention in future studies. |
| Freie Schlagworte: | NBT Depolarization temperature Quenching Stress |
| 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: | 20 Mai 2020 07:00 |
| Letzte Änderung: | 20 Mai 2020 07:00 |
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