Steiner, Sebastian ; Heldt, Jonas ; Sobol, Oded ; Unger, Wolfgang ; Frömling, Till (2021)
Influence of oxygen vacancies on core-shell
formation in solid solutions of (Na,Bi)TiO3 and SrTiO3.
In: Journal of the American Ceramic Society, 104 (9)
doi: 10.1111/jace.17845
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Solid solutions of (Na,Bi)TiO3 (NBT) and SrTiO3 (ST) are materials of interest for high-strain or high-energy density capacitor applications. Often, they exhibit chemical heterogeneity and develop core-shell structures during regular solid-state synthesis with an NBT-rich core. In this case, the NBT forms first so that the strontium needs to diffuse into the material to reach chemical homogeneity. Depending on the presence of core-shell structures, the electrical properties can vary drastically. In this work, we rationalize the effect of variations in oxygen vacancy concentration by Fe-acceptor and Nb-donor doping. It can be shown that a diffusion couple of strontium and oxygen is responsible for chemical homogenization and that the oxygen vacancy content can control the formation of a core-shell structure.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Steiner, Sebastian ; Heldt, Jonas ; Sobol, Oded ; Unger, Wolfgang ; Frömling, Till |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of oxygen vacancies on core-shell formation in solid solutions of (Na,Bi)TiO3 and SrTiO3 |
| Sprache: | Englisch |
| Publikationsjahr: | 8 April 2021 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 104 |
| (Heft-)Nummer: | 9 |
| DOI: | 10.1111/jace.17845 |
| URL / URN: | https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.17... |
| Kurzbeschreibung (Abstract): | Solid solutions of (Na,Bi)TiO3 (NBT) and SrTiO3 (ST) are materials of interest for high-strain or high-energy density capacitor applications. Often, they exhibit chemical heterogeneity and develop core-shell structures during regular solid-state synthesis with an NBT-rich core. In this case, the NBT forms first so that the strontium needs to diffuse into the material to reach chemical homogeneity. Depending on the presence of core-shell structures, the electrical properties can vary drastically. In this work, we rationalize the effect of variations in oxygen vacancy concentration by Fe-acceptor and Nb-donor doping. It can be shown that a diffusion couple of strontium and oxygen is responsible for chemical homogenization and that the oxygen vacancy content can control the formation of a core-shell structure. |
| Freie Schlagworte: | bismuth titanates, core-shell structures, diffusion/diffusivity, ferroelectricity/ferroelectric materials, lead-free ceramics |
| 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: | 07 Jul 2021 06:09 |
| Letzte Änderung: | 07 Jul 2021 06:09 |
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