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Oxygen diffusion in Mg-doped Sm and Gd zirconates with pyrochlore structure. / Sadykov, Vladislav; Shlyakhtina, Anna; Lyskov, Nikolai et al.

In: Ionics, Vol. 26, No. 9, 01.09.2020, p. 4621-4633.

Research output: Contribution to journal › Article › peer-review

Harvard

Sadykov, V, Shlyakhtina, A, Lyskov, N, Sadovskaya, E, Cherepanova, S, Eremeev, N, Skazka, V, Goncharov, V & Kharitonova, E 2020, 'Oxygen diffusion in Mg-doped Sm and Gd zirconates with pyrochlore structure', Ionics, vol. 26, no. 9, pp. 4621-4633. https://doi.org/10.1007/s11581-020-03614-5

APA

Sadykov, V., Shlyakhtina, A., Lyskov, N., Sadovskaya, E., Cherepanova, S., Eremeev, N., Skazka, V., Goncharov, V., & Kharitonova, E. (2020). Oxygen diffusion in Mg-doped Sm and Gd zirconates with pyrochlore structure. Ionics, 26(9), 4621-4633. https://doi.org/10.1007/s11581-020-03614-5

Vancouver

Sadykov V, Shlyakhtina A, Lyskov N, Sadovskaya E, Cherepanova S, Eremeev N et al. Oxygen diffusion in Mg-doped Sm and Gd zirconates with pyrochlore structure. Ionics. 2020 Sept 1;26(9):4621-4633. doi: 10.1007/s11581-020-03614-5

Author

Sadykov, Vladislav ; Shlyakhtina, Anna ; Lyskov, Nikolai et al. / Oxygen diffusion in Mg-doped Sm and Gd zirconates with pyrochlore structure. In: Ionics. 2020 ; Vol. 26, No. 9. pp. 4621-4633.

BibTeX

@article{87cf9112c59b432789f5b71d0b7bf8e1,
title = "Oxygen diffusion in Mg-doped Sm and Gd zirconates with pyrochlore structure",
abstract = "Oxides with pyrochlore structure are promising materials for SOFCs, oxygen and hydrogen separation membranes, and other devices. Ln zirconates attract interest due to their oxygen and protonic mobility. In this work, oxygen transport mechanism in Mg-doped Sm and Gd zirconates was studied. Sm1.9Mg0.1Zr2O6.95 and Gd1.9Mg0.1Zr2O6.95 oxides have been prepared via the mechanical activation and characterized by XRD, TGA, and SEM. Oxygen transport features were studied by the oxygen isotope exchange with C18O2. Isotope substitution of bulk oxygen was demonstrated to be described by the 2D diffusion model. Very fast diffusion within grain boundaries provides fast isotope label distribution over the oxide domains, then tracer distributes due to a slower diffusion within domains{\textquoteright} bulk. Three forms of oxygen were distinguished within grains{\textquoteright} bulk. Very fast diffusion along grain boundaries (Dgb ~ 10−7 cm2/s at 700 °C) can provide high rates of oxygen transport in oxygen separation membranes.",
keywords = "2D diffusion, Diffusion, Isotope exchange of oxygen, Modeling, O conductors, Pyrochlores, ELECTRICAL-CONDUCTIVITY, ANOMALOUS TRANSPORT, NEUTRON-DIFFRACTION, RELAXATION, PROTON, NONSTOICHIOMETRIC PEROVSKITES, OXIDE PYROCHLORES, GRAIN-BOUNDARY, DEFECT CHEMISTRY, ION CONDUCTIVITY",
author = "Vladislav Sadykov and Anna Shlyakhtina and Nikolai Lyskov and Ekaterina Sadovskaya and Svetlana Cherepanova and Nikita Eremeev and Valery Skazka and Vladimir Goncharov and Elena Kharitonova",
year = "2020",
month = sep,
day = "1",
doi = "10.1007/s11581-020-03614-5",
language = "English",
volume = "26",
pages = "4621--4633",
journal = "Ionics",
issn = "0947-7047",
publisher = "Institute for Ionics",
number = "9",

}

RIS

TY - JOUR

T1 - Oxygen diffusion in Mg-doped Sm and Gd zirconates with pyrochlore structure

AU - Sadykov, Vladislav

AU - Shlyakhtina, Anna

AU - Lyskov, Nikolai

AU - Sadovskaya, Ekaterina

AU - Cherepanova, Svetlana

AU - Eremeev, Nikita

AU - Skazka, Valery

AU - Goncharov, Vladimir

AU - Kharitonova, Elena

PY - 2020/9/1

Y1 - 2020/9/1

N2 - Oxides with pyrochlore structure are promising materials for SOFCs, oxygen and hydrogen separation membranes, and other devices. Ln zirconates attract interest due to their oxygen and protonic mobility. In this work, oxygen transport mechanism in Mg-doped Sm and Gd zirconates was studied. Sm1.9Mg0.1Zr2O6.95 and Gd1.9Mg0.1Zr2O6.95 oxides have been prepared via the mechanical activation and characterized by XRD, TGA, and SEM. Oxygen transport features were studied by the oxygen isotope exchange with C18O2. Isotope substitution of bulk oxygen was demonstrated to be described by the 2D diffusion model. Very fast diffusion within grain boundaries provides fast isotope label distribution over the oxide domains, then tracer distributes due to a slower diffusion within domains’ bulk. Three forms of oxygen were distinguished within grains’ bulk. Very fast diffusion along grain boundaries (Dgb ~ 10−7 cm2/s at 700 °C) can provide high rates of oxygen transport in oxygen separation membranes.

AB - Oxides with pyrochlore structure are promising materials for SOFCs, oxygen and hydrogen separation membranes, and other devices. Ln zirconates attract interest due to their oxygen and protonic mobility. In this work, oxygen transport mechanism in Mg-doped Sm and Gd zirconates was studied. Sm1.9Mg0.1Zr2O6.95 and Gd1.9Mg0.1Zr2O6.95 oxides have been prepared via the mechanical activation and characterized by XRD, TGA, and SEM. Oxygen transport features were studied by the oxygen isotope exchange with C18O2. Isotope substitution of bulk oxygen was demonstrated to be described by the 2D diffusion model. Very fast diffusion within grain boundaries provides fast isotope label distribution over the oxide domains, then tracer distributes due to a slower diffusion within domains’ bulk. Three forms of oxygen were distinguished within grains’ bulk. Very fast diffusion along grain boundaries (Dgb ~ 10−7 cm2/s at 700 °C) can provide high rates of oxygen transport in oxygen separation membranes.

KW - 2D diffusion

KW - Diffusion

KW - Isotope exchange of oxygen

KW - Modeling

KW - O conductors

KW - Pyrochlores

KW - ELECTRICAL-CONDUCTIVITY

KW - ANOMALOUS TRANSPORT

KW - NEUTRON-DIFFRACTION

KW - RELAXATION

KW - PROTON

KW - NONSTOICHIOMETRIC PEROVSKITES

KW - OXIDE PYROCHLORES

KW - GRAIN-BOUNDARY

KW - DEFECT CHEMISTRY

KW - ION CONDUCTIVITY

UR - http://www.scopus.com/inward/record.url?scp=85085383761&partnerID=8YFLogxK

U2 - 10.1007/s11581-020-03614-5

DO - 10.1007/s11581-020-03614-5

M3 - Article

AN - SCOPUS:85085383761

VL - 26

SP - 4621

EP - 4633

JO - Ionics

JF - Ionics

SN - 0947-7047

IS - 9

ER -

ID: 24396972