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Proton and oxygen ion conductivity in the pyrochlore/fluorite family of Ln2-: XCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; X = 0, 0.05, 0.1) niobates and tantalates. / Shlyakhtina, A. V.; Pigalskiy, K. S.; Belov, D. A. et al.

In: Dalton Transactions, Vol. 47, No. 7, 21.02.2018, p. 2376-2392.

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

Harvard

Shlyakhtina, AV, Pigalskiy, KS, Belov, DA, Lyskov, NV, Kharitonova, EP, Kolbanev, IV, Borunova, AB, Karyagina, OK, Sadovskaya, EM, Sadykov, VA & Eremeev, NF 2018, 'Proton and oxygen ion conductivity in the pyrochlore/fluorite family of Ln2-: XCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; X = 0, 0.05, 0.1) niobates and tantalates', Dalton Transactions, vol. 47, no. 7, pp. 2376-2392. https://doi.org/10.1039/c7dt03912c

APA

Shlyakhtina, A. V., Pigalskiy, K. S., Belov, D. A., Lyskov, N. V., Kharitonova, E. P., Kolbanev, I. V., Borunova, A. B., Karyagina, O. K., Sadovskaya, E. M., Sadykov, V. A., & Eremeev, N. F. (2018). Proton and oxygen ion conductivity in the pyrochlore/fluorite family of Ln2-: XCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; X = 0, 0.05, 0.1) niobates and tantalates. Dalton Transactions, 47(7), 2376-2392. https://doi.org/10.1039/c7dt03912c

Vancouver

Shlyakhtina AV, Pigalskiy KS, Belov DA, Lyskov NV, Kharitonova EP, Kolbanev IV et al. Proton and oxygen ion conductivity in the pyrochlore/fluorite family of Ln2-: XCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; X = 0, 0.05, 0.1) niobates and tantalates. Dalton Transactions. 2018 Feb 21;47(7):2376-2392. doi: 10.1039/c7dt03912c

Author

Shlyakhtina, A. V. ; Pigalskiy, K. S. ; Belov, D. A. et al. / Proton and oxygen ion conductivity in the pyrochlore/fluorite family of Ln2-: XCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; X = 0, 0.05, 0.1) niobates and tantalates. In: Dalton Transactions. 2018 ; Vol. 47, No. 7. pp. 2376-2392.

BibTeX

@article{816e76028bbf456f8fa654a42803279c,
title = "Proton and oxygen ion conductivity in the pyrochlore/fluorite family of Ln2-: XCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; X = 0, 0.05, 0.1) niobates and tantalates",
abstract = "The tolerance factor is a good criterion to understand the structural transitions in Ln2-xCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; x = 0, 0.05, 0.1). Decreasing the Ln ionic radius in Ln2ScNb(Ta)O7 leads to a morphotropic transition from a pyrochlore to a fluorite-like structure. Ca2+-doping leads to a pyrochlore-to-fluorite transition in Ln2-xCaxScMO7-δ (Ln = La, Sm) and a fluorite-to-pyrochlore transition in Ho2-xCaxScNbO7-δ. Proton contribution to the total conductivity was observed for Ln2-xCaxScNb(Ta)O7-δ (Ln = La, Sm; x = 0, 0.05, 0.1) 3+/5+ pyrochlores and the maximum proton contribution was shown by Sm1.9Ca0.1ScMO6.95 (M = Nb, Ta), which are located at the boundary between pyrochlores and fluorites (comparative study of electrical conduction and oxygen diffusion). Proton conduction of Sm1.9Ca0.1ScNbO6.95 and Sm1.9Ca0.1ScTaO6.95 pyrochlores persists up to 800 and 850 °C, respectively. The conductivity of fluorite-like Ho2-xCaxScNbO7-δ (x = 0, 0.05) and Yb2ScNbO7 is dominated by the oxygen ion transport, in accordance with their energy activation values 1.09-1.19 eV. The dielectric permittivity and TG studies were used for the investigation of oxygen vacancy dynamics and water incorporation into the Ln2-xCaxScNb(Ta)O7-δ (Ln = La, Sm, Ho, Yb; x = 0, 0.05, 0.1) lattice. It is shown that oxygen vacancy-related dielectric relaxation in the range of 550-650 °C (ambient air), typical of pyrochlores and fluorites with pure oxygen ion conductivity, decreases and disappears for proton-conducting oxides.",
keywords = "RARE-EARTH, ELECTRICAL-CONDUCTIVITY, MAGNETIC-PROPERTIES, CRYSTAL-STRUCTURE, PHASE-TRANSITION, LN(3)NBO(7) LN, TEMPERATURE, OXIDES, LU, GD",
author = "Shlyakhtina, {A. V.} and Pigalskiy, {K. S.} and Belov, {D. A.} and Lyskov, {N. V.} and Kharitonova, {E. P.} and Kolbanev, {I. V.} and Borunova, {A. B.} and Karyagina, {O. K.} and Sadovskaya, {E. M.} and Sadykov, {V. A.} and Eremeev, {N. F.}",
year = "2018",
month = feb,
day = "21",
doi = "10.1039/c7dt03912c",
language = "English",
volume = "47",
pages = "2376--2392",
journal = "Dalton Transactions",
issn = "1477-9226",
publisher = "Royal Society of Chemistry",
number = "7",

}

RIS

TY - JOUR

T1 - Proton and oxygen ion conductivity in the pyrochlore/fluorite family of Ln2-: XCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; X = 0, 0.05, 0.1) niobates and tantalates

AU - Shlyakhtina, A. V.

AU - Pigalskiy, K. S.

AU - Belov, D. A.

AU - Lyskov, N. V.

AU - Kharitonova, E. P.

AU - Kolbanev, I. V.

AU - Borunova, A. B.

AU - Karyagina, O. K.

AU - Sadovskaya, E. M.

AU - Sadykov, V. A.

AU - Eremeev, N. F.

PY - 2018/2/21

Y1 - 2018/2/21

N2 - The tolerance factor is a good criterion to understand the structural transitions in Ln2-xCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; x = 0, 0.05, 0.1). Decreasing the Ln ionic radius in Ln2ScNb(Ta)O7 leads to a morphotropic transition from a pyrochlore to a fluorite-like structure. Ca2+-doping leads to a pyrochlore-to-fluorite transition in Ln2-xCaxScMO7-δ (Ln = La, Sm) and a fluorite-to-pyrochlore transition in Ho2-xCaxScNbO7-δ. Proton contribution to the total conductivity was observed for Ln2-xCaxScNb(Ta)O7-δ (Ln = La, Sm; x = 0, 0.05, 0.1) 3+/5+ pyrochlores and the maximum proton contribution was shown by Sm1.9Ca0.1ScMO6.95 (M = Nb, Ta), which are located at the boundary between pyrochlores and fluorites (comparative study of electrical conduction and oxygen diffusion). Proton conduction of Sm1.9Ca0.1ScNbO6.95 and Sm1.9Ca0.1ScTaO6.95 pyrochlores persists up to 800 and 850 °C, respectively. The conductivity of fluorite-like Ho2-xCaxScNbO7-δ (x = 0, 0.05) and Yb2ScNbO7 is dominated by the oxygen ion transport, in accordance with their energy activation values 1.09-1.19 eV. The dielectric permittivity and TG studies were used for the investigation of oxygen vacancy dynamics and water incorporation into the Ln2-xCaxScNb(Ta)O7-δ (Ln = La, Sm, Ho, Yb; x = 0, 0.05, 0.1) lattice. It is shown that oxygen vacancy-related dielectric relaxation in the range of 550-650 °C (ambient air), typical of pyrochlores and fluorites with pure oxygen ion conductivity, decreases and disappears for proton-conducting oxides.

AB - The tolerance factor is a good criterion to understand the structural transitions in Ln2-xCaxScMO7-δ (Ln = La, Sm, Ho, Yb; M = Nb, Ta; x = 0, 0.05, 0.1). Decreasing the Ln ionic radius in Ln2ScNb(Ta)O7 leads to a morphotropic transition from a pyrochlore to a fluorite-like structure. Ca2+-doping leads to a pyrochlore-to-fluorite transition in Ln2-xCaxScMO7-δ (Ln = La, Sm) and a fluorite-to-pyrochlore transition in Ho2-xCaxScNbO7-δ. Proton contribution to the total conductivity was observed for Ln2-xCaxScNb(Ta)O7-δ (Ln = La, Sm; x = 0, 0.05, 0.1) 3+/5+ pyrochlores and the maximum proton contribution was shown by Sm1.9Ca0.1ScMO6.95 (M = Nb, Ta), which are located at the boundary between pyrochlores and fluorites (comparative study of electrical conduction and oxygen diffusion). Proton conduction of Sm1.9Ca0.1ScNbO6.95 and Sm1.9Ca0.1ScTaO6.95 pyrochlores persists up to 800 and 850 °C, respectively. The conductivity of fluorite-like Ho2-xCaxScNbO7-δ (x = 0, 0.05) and Yb2ScNbO7 is dominated by the oxygen ion transport, in accordance with their energy activation values 1.09-1.19 eV. The dielectric permittivity and TG studies were used for the investigation of oxygen vacancy dynamics and water incorporation into the Ln2-xCaxScNb(Ta)O7-δ (Ln = La, Sm, Ho, Yb; x = 0, 0.05, 0.1) lattice. It is shown that oxygen vacancy-related dielectric relaxation in the range of 550-650 °C (ambient air), typical of pyrochlores and fluorites with pure oxygen ion conductivity, decreases and disappears for proton-conducting oxides.

KW - RARE-EARTH

KW - ELECTRICAL-CONDUCTIVITY

KW - MAGNETIC-PROPERTIES

KW - CRYSTAL-STRUCTURE

KW - PHASE-TRANSITION

KW - LN(3)NBO(7) LN

KW - TEMPERATURE

KW - OXIDES

KW - LU

KW - GD

UR - http://www.scopus.com/inward/record.url?scp=85042119162&partnerID=8YFLogxK

U2 - 10.1039/c7dt03912c

DO - 10.1039/c7dt03912c

M3 - Article

C2 - 29372920

AN - SCOPUS:85042119162

VL - 47

SP - 2376

EP - 2392

JO - Dalton Transactions

JF - Dalton Transactions

SN - 1477-9226

IS - 7

ER -

ID: 10428321