Weyland, Florian ; Eisele, Thorsten ; Steiner, Sebastian ; Frömling, Till ; Rossetti, George A. jr. ; Rödel, Jürgen ; Novak, Nikola (2018)
Long term stability of electrocaloric response in barium zirconate titanate.
In: Journal of the European Ceramic Society, 38
doi: 10.1016/j.jeurceramsoc.2017.09.018
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The stability of the electrocaloric effect under electric field cycling is an important consideration in the development of solid-state cooling devices. Here we report measurements carried out on Ba(Zr0.2Ti0.8)O3 ceramics which reveal that the adiabatic temperature change, polarization-electricfield hysteresis loops and dielectric permittivity/loss show stable behavior up to 10^5 cycles. We further demonstrate that the loss in electrocaloric response observed after 10^5 cycles is associated with the migration of oxygen vacancies. As a result, the electrical properties of the material are changed leading to an increase in leakage current and Joule heating. Reversing the polarity of the electric field after every 10^5 cycles changes the migration direction of oxygen vacancies, thereby preventing charge accumulation at grain boundaries and electrodes. By doing so, the electrocaloric stability is improved and the adiabatic temperature remains constant even after 10^6 cycles, much higher than achieved in commercially available barium titanate ceramics.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Weyland, Florian ; Eisele, Thorsten ; Steiner, Sebastian ; Frömling, Till ; Rossetti, George A. jr. ; Rödel, Jürgen ; Novak, Nikola |
| Art des Eintrags: | Bibliographie |
| Titel: | Long term stability of electrocaloric response in barium zirconate titanate |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Januar 2018 |
| Verlag: | Elsevier Science Ltd, England |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 38 |
| DOI: | 10.1016/j.jeurceramsoc.2017.09.018 |
| URL / URN: | http://dx.doi.org/10.1016/j.jeurceramsoc.2017.09.018 |
| Kurzbeschreibung (Abstract): | The stability of the electrocaloric effect under electric field cycling is an important consideration in the development of solid-state cooling devices. Here we report measurements carried out on Ba(Zr0.2Ti0.8)O3 ceramics which reveal that the adiabatic temperature change, polarization-electricfield hysteresis loops and dielectric permittivity/loss show stable behavior up to 10^5 cycles. We further demonstrate that the loss in electrocaloric response observed after 10^5 cycles is associated with the migration of oxygen vacancies. As a result, the electrical properties of the material are changed leading to an increase in leakage current and Joule heating. Reversing the polarity of the electric field after every 10^5 cycles changes the migration direction of oxygen vacancies, thereby preventing charge accumulation at grain boundaries and electrodes. By doing so, the electrocaloric stability is improved and the adiabatic temperature remains constant even after 10^6 cycles, much higher than achieved in commercially available barium titanate ceramics. |
| Freie Schlagworte: | Electrocaloric e ff ect Ferroelectric Resistance degradation Fatigue Lead-free |
| 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: | 01 Dez 2017 14:29 |
| Letzte Änderung: | 17 Aug 2021 08:13 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum