Schaab, S. ; Schulz, M. ; Fritze, H. ; Eichel, R.-A. ; Erdem, E. ; Rüscher, C. H. ; Hummelt, S. ; Granzow, T. (2012)
Influence of reducing atmosphere on the defect chemistry of lead lanthanum zirconate titanate (8/65/35).
In: Solid State Ionics, 228
doi: 10.1016/j.ssi.2012.09.003
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The defect structure of lanthanum-modified lead-zirconate-titanate (PLZT) is altered by annealing at 700 °C in different reducing atmospheres and studied by conductivity measurements, different spectroscopic techniques and determination of the thermally stimulated depolarization current (TSDC). It is found that annealing at an oxygen partial pressure of pO2<10−16 bar leads to the formation of oxygen vacancies VO• • or VO×. If hydrogen is present in the reducing atmosphere, it can be incorporated as either HO• or OHO•. The defects can be evidenced in both the IR and UV/VIS absorption spectra. Additionally, high levels of reduction cause a shift in the Fermi level, leading to the population of intrinsic Fe impurities, which can possibly be utilized as photorefractive centers.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Schaab, S. ; Schulz, M. ; Fritze, H. ; Eichel, R.-A. ; Erdem, E. ; Rüscher, C. H. ; Hummelt, S. ; Granzow, T. |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of reducing atmosphere on the defect chemistry of lead lanthanum zirconate titanate (8/65/35) |
| Sprache: | Englisch |
| Publikationsjahr: | 30 November 2012 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Solid State Ionics |
| Jahrgang/Volume einer Zeitschrift: | 228 |
| DOI: | 10.1016/j.ssi.2012.09.003 |
| Kurzbeschreibung (Abstract): | The defect structure of lanthanum-modified lead-zirconate-titanate (PLZT) is altered by annealing at 700 °C in different reducing atmospheres and studied by conductivity measurements, different spectroscopic techniques and determination of the thermally stimulated depolarization current (TSDC). It is found that annealing at an oxygen partial pressure of pO2<10−16 bar leads to the formation of oxygen vacancies VO• • or VO×. If hydrogen is present in the reducing atmosphere, it can be incorporated as either HO• or OHO•. The defects can be evidenced in both the IR and UV/VIS absorption spectra. Additionally, high levels of reduction cause a shift in the Fermi level, leading to the population of intrinsic Fe impurities, which can possibly be utilized as photorefractive centers. |
| Freie Schlagworte: | PLZT; Reduction treatment; Hydrogen defects; Oxygen vacancies |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 23 Okt 2012 09:27 |
| Letzte Änderung: | 05 Mär 2013 10:03 |
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