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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/47770423
Record Status
Checked
Record Id
47770423
Title
Revisiting the thermal and chemical expansion and stability of La0.6Sr0.4FeO3−δ
Contributors
C de Leeuwe
,
W Hu
,
D Neagu
,
EI Papaioannou
,
S Pramana
,
B Ray
,
JS Evans (STFC Rutherford Appleton Lab.)
,
IS Metcalfe
Abstract
The thermal and chemical expansivity of La1-xSrxFeO3-δ (x = 0.4) was measured using in situ powder neutron and synchrotron X-ray diffraction at temperatures between 932 K and 1170 K and oxygen partial pressures, , between 10−19 bar and 0.1 bar, giving a wide range of oxygen non-stoichiometry from δ 0.05 to 0.22. Changes in δ were measured independently using gas analysis. This and temperature range covers the material’s use as a chemical looping oxygen carrier, a sensor material and in solid oxide fuel cells. Thermal and chemical expansivities were found to be dependent on the oxygen non-stoichiometry, δ. For δ < 0.2 and T = 932–1050 K, the linear thermal expansivity was 5.72(4) × 10−5 Å/K and the linear chemical expansivity was 0.144(9) Å per unit change in δ. For δ > 0.2 and T = 973–1173 K, the linear thermal expansivity increases to 6.18(8) × 10−5 Å/K. For δ > 0.2, the linear chemical expansivity varies with both δ and temperature.
Organisation
ISIS
,
ISIS-HRPD
,
STFC
Keywords
Funding Information
ERC
(FP/2007–2013);
ERC
(320725);
EPSRC
(EP/P007767/1);
EPSRC
(EP/P024807/1)
Related Research Object(s):
10.5286/ISIS.E.86390351
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
J Solid State Chem
293 (2021): 121838.
doi:10.1016/j.jssc.2020.121838
2021
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