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Rare earth barium cobaltites: potential candidates for low-temperature oxygen separation

Narayanan, AM and Umarji, AM (2020) Rare earth barium cobaltites: potential candidates for low-temperature oxygen separation. In: SN Applied Sciences, 2 (3).

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Official URL: https://doi.org/10.1007/s42452-020-2218-1


Oxygen storage materials with low operating temperatures have gained attraction in oxygen separation and enrichment applications. Herein, YBaCo 2O 6-x, Dy0.5Y0.5BaCo2O6-x and DyBaCo 2O 6-x are explored for low-temperature oxygen enrichment. These oxides were synthesized through solid-state reaction and the oxygen separation properties at various temperatures were studied using a home-built volumetric setup. The oxygen intake temperatures of the sample were found to vary depending upon the rare-earth cation size. The lowest absorption temperature of 523 K was observed for DyBaCo 2O 6-x. Interestingly, DyBaCo 2O 6-x had the largest saddle point radii through which oxide ion migration occurs. The effect of the synthesis method and microstructure on the oxygen holding capacity of DyBaCo 2O 6-x has also been analyzed. For this, DyBaCo 2O 6-x was synthesized through a combination of solution combustion synthesis followed by calcination and sintering at different temperatures. The particle size was found to have a profound effect on the oxygen intake of DyBaCo 2O 6-x. © 2020, Springer Nature Switzerland AG.

Item Type: Journal Article
Publication: SN Applied Sciences
Publisher: Springer Nature
Additional Information: The copyright for this article belongs to the Authors.
Keywords: Barium; Barium compounds; Cobalt compounds; Combustion synthesis; Dysprosium compounds; Particle size; Rare earths; Separation; Sintering; Solid state reactions; Temperature, Absorption temperature; Intake temperature; Low operating temperature; Oxygen enrichment; Oxygen separation; Oxygen storage materials; Rare earth cations; Solution combustion synthesis, Yttrium compounds
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 24 Jan 2023 09:23
Last Modified: 24 Jan 2023 09:23
URI: https://eprints.iisc.ac.in/id/eprint/79399

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