Novak, Nikola ; Weyland, Florian ; Rossetti, George A. jr. (2021)
Electrocaloric properties and caloric figure of merit in the ferroelectric solid
solution BaZrO3–BaTiO3 (BZT).
In: Journal of the European Ceramic Society, 41 (2)
doi: 10.1016/j.jeurceramsoc.2020.10.017
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The impact of the differing phase change characteristics on the electrocaloric effect (ECE) and thermophysical properties of Ba(ZrxTi1-x)O3 (BZT) were investigated. It is demonstrated that the ECE reduces strongly with increasing Zr concentration, from 1.25 K to 0.10 K. The strong reduction of ECE is associated with the vanishing of the latent heat as the nature of paraelectric to ferroelectric phase transition changes. Despite the second order nature of the phase transition, an enhanced electrocaloric responsivity, 0.225 × 10^-6 Km V-1, occurs at the triple point composition (x = 0.13), where the stability fields of ferroelectric phases converge. The decreasing ECE and thermophysical properties with increasing Zr concentration result in a more than one order of magnitude reduction in a caloric figure of merit, from ~3500 J m^-1 s^-1/2 to ~200 J m ^-1 s^-1/2. The caloric figure of merit was used to compare the performance of other representative electrocaloric, magnetocaloric and mechanocaloric materials.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Novak, Nikola ; Weyland, Florian ; Rossetti, George A. jr. |
| Art des Eintrags: | Bibliographie |
| Titel: | Electrocaloric properties and caloric figure of merit in the ferroelectric solid solution BaZrO3–BaTiO3 (BZT) |
| Sprache: | Englisch |
| Publikationsjahr: | Februar 2021 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 41 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1016/j.jeurceramsoc.2020.10.017 |
| Kurzbeschreibung (Abstract): | The impact of the differing phase change characteristics on the electrocaloric effect (ECE) and thermophysical properties of Ba(ZrxTi1-x)O3 (BZT) were investigated. It is demonstrated that the ECE reduces strongly with increasing Zr concentration, from 1.25 K to 0.10 K. The strong reduction of ECE is associated with the vanishing of the latent heat as the nature of paraelectric to ferroelectric phase transition changes. Despite the second order nature of the phase transition, an enhanced electrocaloric responsivity, 0.225 × 10^-6 Km V-1, occurs at the triple point composition (x = 0.13), where the stability fields of ferroelectric phases converge. The decreasing ECE and thermophysical properties with increasing Zr concentration result in a more than one order of magnitude reduction in a caloric figure of merit, from ~3500 J m^-1 s^-1/2 to ~200 J m ^-1 s^-1/2. The caloric figure of merit was used to compare the performance of other representative electrocaloric, magnetocaloric and mechanocaloric materials. |
| Freie Schlagworte: | Ferroelectrics, Phase transition, Electrocaloric effect, Thermophysical properties, Caloric cooling power |
| 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: | 14 Dez 2020 06:46 |
| Letzte Änderung: | 17 Aug 2021 08:13 |
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