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Tsvetkov DS, Ananjev MV, Eremin VA, et al. Oxygen nonstoichiometry, defect structure and oxygen diffusion in the double perovskite GdBaCo2O6-δ. Dalton Trans. 2014;43(42):15937-43doi: 10.1039/c4dt01486c.
Tsvetkov, D. S., Ananjev, M. V., Eremin, V. A., Zuev, A. Y., & Kurumchin, E. K. h. (2014). Oxygen nonstoichiometry, defect structure and oxygen diffusion in the double perovskite GdBaCo2O6-δ. Dalton transactions (Cambridge, England : 2003), 43(42), 15937-43. https://doi.org/10.1039/c4dt01486c
Tsvetkov, D S, et al. "Oxygen nonstoichiometry, defect structure and oxygen diffusion in the double perovskite GdBaCo2O6-δ." Dalton transactions (Cambridge, England : 2003) vol. 43,42 (2014): 15937-43. doi: https://doi.org/10.1039/c4dt01486c
Tsvetkov DS, Ananjev MV, Eremin VA, Zuev AY, Kurumchin EKh. Oxygen nonstoichiometry, defect structure and oxygen diffusion in the double perovskite GdBaCo2O6-δ. Dalton Trans. 2014 Nov 14;43(42):15937-43. doi: 10.1039/c4dt01486c. PMID: 25231733.
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Dalton Trans. 2014 Nov 14;43(42):15937-43. doi: 10.1039/c4dt01486c.

Oxygen nonstoichiometry, defect structure and oxygen diffusion in the double perovskite GdBaCo2O6-δ.

Dalton transactions (Cambridge, England : 2003)

D S Tsvetkov, M V Ananjev, V A Eremin, A Yu Zuev, E Kh Kurumchin

Affiliations

  1. Department of Chemistry, Institute of Natural Sciences, Ural Federal University, Ekaterinburg, 620000, Russia. [email protected].

PMID: 25231733 DOI: 10.1039/c4dt01486c

Abstract

Oxygen nonstoichiometry of GdBaCo2O6-δ was studied by means of the thermogravimetric technique in the temperature range 600-1000 °C. The defect structure model based on the simple cubic perovskite GdCoO3-δ was shown to be valid for GdBaCo2O6-δ up to temperatures as low as 600 °C. Two independent methods, namely dc-polarization with the YSZ microelectrode and (18)O-isotope exchange with gas phase analysis, were used to determine the oxygen self-diffusion coefficient in the double perovskite GdBaCo2O6-δ. All measurements were carried out using ceramic samples identically prepared from the same single phase powder of GdBaCo2O6-δ. The experimental data on oxygen nonstoichiometry of GdBaCo2O6-δ allowed a precise calculation of the oxygen interphase exchange rate and the oxygen tracer diffusion coefficient on the basis of the isotope exchange measurements. The values of the oxygen self-diffusion coefficient measured by the dc-polarization technique were found to be in very good agreement with the ones of the oxygen tracer diffusion coefficient.

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