Hummelt, Stefan ; Flege, Stefan ; Ensinger, Wolfgang (2010)
18Oxygen diffusion in polycrystalline lead lanthanum zirconate titanate.
In: physica status solidi (RRL) - Rapid Research Letters, 4 (8-9)
doi: 10.1002/pssr.201004182
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
18O oxygen tracer diffusion coefficients and activation energies were determined in polycrystalline PLZT (lead lanthanum zirconate titanate) with varying La concentration in the temperature range of 500 °C to 800 °C. For this purpose the isotope exchange method and Secondary Ion Mass Spectrometry (SIMS) depth profiling were used. As a novel approach a chemically reduced sample was prepared by anneal- ing at low oxygen partial pressure (p (O2) ≈ 10–13 Pa). Subsequently the sample was thermally charged with 18O, too. Results indicate a higher diffusion rate in the reduced sample than in as-received PLZT thus leading to the assumption that the diffusion mechanism in PLZT is vacancy driven despite the strong donor doping of the perovskite lattice.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Hummelt, Stefan ; Flege, Stefan ; Ensinger, Wolfgang |
| Art des Eintrags: | Bibliographie |
| Titel: | 18Oxygen diffusion in polycrystalline lead lanthanum zirconate titanate |
| Sprache: | Englisch |
| Publikationsjahr: | September 2010 |
| Verlag: | WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | physica status solidi (RRL) - Rapid Research Letters |
| Jahrgang/Volume einer Zeitschrift: | 4 |
| (Heft-)Nummer: | 8-9 |
| DOI: | 10.1002/pssr.201004182 |
| Kurzbeschreibung (Abstract): | 18O oxygen tracer diffusion coefficients and activation energies were determined in polycrystalline PLZT (lead lanthanum zirconate titanate) with varying La concentration in the temperature range of 500 °C to 800 °C. For this purpose the isotope exchange method and Secondary Ion Mass Spectrometry (SIMS) depth profiling were used. As a novel approach a chemically reduced sample was prepared by anneal- ing at low oxygen partial pressure (p (O2) ≈ 10–13 Pa). Subsequently the sample was thermally charged with 18O, too. Results indicate a higher diffusion rate in the reduced sample than in as-received PLZT thus leading to the assumption that the diffusion mechanism in PLZT is vacancy driven despite the strong donor doping of the perovskite lattice. |
| Freie Schlagworte: | diffusion; oxygen vacancies; ferroelectrics; electro-optics; perovskite materials |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 12 Dez 2012 10:04 |
| Letzte Änderung: | 05 Mär 2013 10:04 |
| PPN: | |
| Sponsoren: | Funded by Deutsche Forschungsgemeinschaft (DFG) and Department of Materials Science of the Technische Universität Darmstadt, Germany |
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