Oxygen ion and electron conductivity in fluorite-like molybdates Nd 5 Mo 3 O 16 and Pr 5 Mo 3 O 16
Valentina I. Voronkova
1
,
I. A. Leonidov
2
,
E. Kharitonova
1
,
D. A. Belov
1
,
Olga N Leonidova
2
,
V. L. Kozhevnikov
2
Publication type: Journal Article
Publication date: 2014-12-01
scimago Q1
wos Q1
SJR: 1.192
CiteScore: 11.8
Impact factor: 6.3
ISSN: 09258388, 18734669
Materials Chemistry
Metals and Alloys
Mechanical Engineering
Mechanics of Materials
Abstract
Abstract The formation of fluorite-like solid solutions near composition Ln 5 Mo 3 O 16+ δ is observed in binary systems Ln 2 O 3 –MoO 3 , where Ln = Nd and Pr, at synthesis in the air. The oxide ratio Ln 2 O 3 :MoO 3 within homogeneous solubility range varies from 3:4 to 7:8 and from 9:11 to 7:8 for neodymium and praseodymium oxides, respectively. The oxygen pressure dependent isotherms in Ln 5 Mo 3 O 16+ δ demonstrate mixed, oxygen-ion and electron, character of conductivity. The ion transference numbers change from 0.16 to 0.92 at variations of oxygen pressure and temperature within 10 –5 –0.5 atm and 700–950 °С, respectively. The oxygen ion and electron components of conductivity are characterized by the activation energy of about 1.0 and 1.4 eV, respectively. It is argued that the ion contribution is related with jumps of off-stoichiometric oxygen over structural interstitials in the fluorite-like crystalline lattice.
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Voronkova V. I. et al. Oxygen ion and electron conductivity in fluorite-like molybdates Nd 5 Mo 3 O 16 and Pr 5 Mo 3 O 16 // Journal of Alloys and Compounds. 2014. Vol. 615. pp. 395-400.
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Voronkova V. I., Leonidov I. A., Kharitonova E., Belov D. A., Patrakeev M., Leonidova O. N., Kozhevnikov V. L. Oxygen ion and electron conductivity in fluorite-like molybdates Nd 5 Mo 3 O 16 and Pr 5 Mo 3 O 16 // Journal of Alloys and Compounds. 2014. Vol. 615. pp. 395-400.
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TY - JOUR
DO - 10.1016/j.jallcom.2014.07.019
UR - https://doi.org/10.1016/j.jallcom.2014.07.019
TI - Oxygen ion and electron conductivity in fluorite-like molybdates Nd 5 Mo 3 O 16 and Pr 5 Mo 3 O 16
T2 - Journal of Alloys and Compounds
AU - Voronkova, Valentina I.
AU - Leonidov, I. A.
AU - Kharitonova, E.
AU - Belov, D. A.
AU - Patrakeev, Mikhail
AU - Leonidova, Olga N
AU - Kozhevnikov, V. L.
PY - 2014
DA - 2014/12/01
PB - Elsevier
SP - 395-400
VL - 615
SN - 0925-8388
SN - 1873-4669
ER -
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@article{2014_Voronkova,
author = {Valentina I. Voronkova and I. A. Leonidov and E. Kharitonova and D. A. Belov and Mikhail Patrakeev and Olga N Leonidova and V. L. Kozhevnikov},
title = {Oxygen ion and electron conductivity in fluorite-like molybdates Nd 5 Mo 3 O 16 and Pr 5 Mo 3 O 16},
journal = {Journal of Alloys and Compounds},
year = {2014},
volume = {615},
publisher = {Elsevier},
month = {dec},
url = {https://doi.org/10.1016/j.jallcom.2014.07.019},
pages = {395--400},
doi = {10.1016/j.jallcom.2014.07.019}
}