Details
| Original language | English |
|---|---|
| Pages (from-to) | 56-63 |
| Number of pages | 8 |
| Journal | SOLID STATE IONICS |
| Volume | 228 |
| Early online date | 17 Oct 2012 |
| Publication status | Published - 30 Nov 2012 |
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 H O• 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.
Keywords
- Hydrogen defects, Oxygen vacancies, PLZT, Reduction treatment
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: SOLID STATE IONICS, Vol. 228, 30.11.2012, p. 56-63.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of reducing atmosphere on the defect chemistry of lead lanthanum zirconate titanate (8/65/35)
AU - Schaab, S.
AU - Schulz, M.
AU - Fritze, H.
AU - Eichel, R. A.
AU - Erdem, E.
AU - Rüscher, C. H.
AU - Hummelt, S.
AU - Granzow, T.
N1 - Funding Information: Financial support through LEIBNITZ-Award by Jürgen Rödel, the Energie-Forschungszentrum Niedersachsen (EFZN, Energy Research Center Niedersachsen) , the German Research Foundation (DFG, Deutsche Forschungsgemeinschaft) and the Collaborative Research Center 595 is gratefully acknowledged.
PY - 2012/11/30
Y1 - 2012/11/30
N2 - 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 H O• 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.
AB - 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 H O• 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.
KW - Hydrogen defects
KW - Oxygen vacancies
KW - PLZT
KW - Reduction treatment
UR - http://www.scopus.com/inward/record.url?scp=84867415181&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2012.09.003
DO - 10.1016/j.ssi.2012.09.003
M3 - Article
AN - SCOPUS:84867415181
VL - 228
SP - 56
EP - 63
JO - SOLID STATE IONICS
JF - SOLID STATE IONICS
SN - 0167-2738
ER -