Details
| Original language | English |
|---|---|
| Pages (from-to) | 1085-1089 |
| Number of pages | 5 |
| Journal | Journal of solid state chemistry |
| Volume | 184 |
| Issue number | 5 |
| Early online date | 17 Mar 2011 |
| Publication status | Published - May 2011 |
Abstract
The effect of CO2 on the two phase perovskite with average composition of BaCo0.4Fe0.4Zr0.2O 3-δ is investigated by in-situ X-ray diffraction (XRD) as well as transmission electron microscopy (TEM). Partial decomposition of the BCFZ into high-temperature rhombohedral BaCO3 polymorph was observed during annealing in an atmosphere, which contained 50 vol% CO2/50 vol% N2 at 1173 K. This carbonate structure is not quenchable and cannot be detected by ex-situ methods. Additionally, the reversible phase transition of BaCO3 from orthorhombic to rhombohedral to cubic at different temperatures accompanied by formation of CoO was shown by in-situ XRD and TEM. Furthermore, complete regeneration of perovskite phase was obtained after high-temperature treatment under CO2-free conditions.
Keywords
- BCFZ, Carbonate, CO stability, In-situ XRD, Perovskite, Phase transition, TEM
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Materials Science(all)
- Ceramics and Composites
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Physical and Theoretical Chemistry
- Chemistry(all)
- Inorganic Chemistry
- Materials Science(all)
- Materials Chemistry
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In: Journal of solid state chemistry, Vol. 184, No. 5, 05.2011, p. 1085-1089.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - In-situ X-ray diffraction study of carbonate formation and decomposition in perovskite-type BCFZ
AU - Efimov, Konstantin
AU - Czuprat, Oliver
AU - Feldhoff, Armin
N1 - Funding Information: K.E. and A.F. gratefully acknowledge financial support by the State of Lower Saxony (Germany, NTH bottom-up project, No. 21-71023-25-7/09 ). O.C. appreciates funding from the European Union's Seventh Framework Program FP7/2007-2013 under grant agreement No. 228701 . The authors gratefully acknowledge fruitful discussions with Prof. Jürgen Caro.
PY - 2011/5
Y1 - 2011/5
N2 - The effect of CO2 on the two phase perovskite with average composition of BaCo0.4Fe0.4Zr0.2O 3-δ is investigated by in-situ X-ray diffraction (XRD) as well as transmission electron microscopy (TEM). Partial decomposition of the BCFZ into high-temperature rhombohedral BaCO3 polymorph was observed during annealing in an atmosphere, which contained 50 vol% CO2/50 vol% N2 at 1173 K. This carbonate structure is not quenchable and cannot be detected by ex-situ methods. Additionally, the reversible phase transition of BaCO3 from orthorhombic to rhombohedral to cubic at different temperatures accompanied by formation of CoO was shown by in-situ XRD and TEM. Furthermore, complete regeneration of perovskite phase was obtained after high-temperature treatment under CO2-free conditions.
AB - The effect of CO2 on the two phase perovskite with average composition of BaCo0.4Fe0.4Zr0.2O 3-δ is investigated by in-situ X-ray diffraction (XRD) as well as transmission electron microscopy (TEM). Partial decomposition of the BCFZ into high-temperature rhombohedral BaCO3 polymorph was observed during annealing in an atmosphere, which contained 50 vol% CO2/50 vol% N2 at 1173 K. This carbonate structure is not quenchable and cannot be detected by ex-situ methods. Additionally, the reversible phase transition of BaCO3 from orthorhombic to rhombohedral to cubic at different temperatures accompanied by formation of CoO was shown by in-situ XRD and TEM. Furthermore, complete regeneration of perovskite phase was obtained after high-temperature treatment under CO2-free conditions.
KW - BCFZ
KW - Carbonate
KW - CO stability
KW - In-situ XRD
KW - Perovskite
KW - Phase transition
KW - TEM
UR - http://www.scopus.com/inward/record.url?scp=79955635834&partnerID=8YFLogxK
U2 - 10.1016/j.jssc.2011.03.023
DO - 10.1016/j.jssc.2011.03.023
M3 - Article
AN - SCOPUS:79955635834
VL - 184
SP - 1085
EP - 1089
JO - Journal of solid state chemistry
JF - Journal of solid state chemistry
SN - 0022-4596
IS - 5
ER -