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Research Article | Open Access

Structure and transport properties of zirconia crystals co-doped by scandia, ceria and yttria

D.A. Agarkova,b( ), M.A. Borikc, S.I. Bredikhina,b, I.N. Burmistrova,b, G.M. Eliseevaa, V.A. Kolotygina, A.V. Kulebyakinc, I.E. Kuritsynaa, E.E. Lomonovac, F.O. Milovichd, V.A. Myzinac, P.A. Ryabochkinae, N.Yu. Tabachkovad, T.V. Volkovae
Institute of Solid State Physics RAS, 2 Academician Osipyan Str., 142432, Chernogolovka, Moscow Distr., Russia
Moscow Institute of Physics and Technology, Institutsky Lane 9, 141700, Dolgoprudny, Moscow District, Russia
A.M. Prokhorov General Physics Institute Russian Academy of Sciences, Vavilov Str. 38, 119991, Moscow, Russia
National University of Science and Technology (MISIS), Leninskiy Prospekt 4, 119049, Moscow, Russia
Ogarev Mordovia State University, 430005, Saransk, Russian Federation

Peer review under responsibility of The Chinese Ceramic Society.

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Graphical Abstract

Abstract

This work is a study of the effect of co-doping (ZrO2)0.9(Sc2O3)0.1 solid solution with yttria and/or ceria on the phase composition, local structure and transport properties of the crystals. The solid solution crystals were grown using directional melt crystallization in cold crucible. We show that ceria co-doping of the crystals does not stabilize the high-temperature cubic phase in the entire crystal bulk, unlike yttria co-doping. Ceria co-doping of the (ZrO2)0.9(Sc2O3)0.1 crystals increases their conductivity, whereas the addition of 1 mol.% yttria tangibly reduces the conductivity. Equimolar co-doping of the (ZrO2)0.9(Sc2O3)0.1 crystals with ceria and yttria changes the conductivity but slightly. Optical spectroscopy of the local structure of the crystals identified different types of optical centers. We found that the fraction of the trivalent cations having a vacancy in the first coordination sphere in the ceria co-doped crystals is smaller compared with that in the yttria co-doped crystals.

Keywords

Single crystalsSolid oxide fuel cellSolid solutionsIonic conducting materialsZrO2-Sc2O3-CeO2-Y2O3

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Journal of Materiomics
Volume 5 Issue 2,
June 2019
Pages 273-279
DOI: 10.1016/j.jmat.2019.02.004
Cite this article:
Agarkov D, Borik M, Bredikhin S, et al. Structure and transport properties of zirconia crystals co-doped by scandia, ceria and yttria. Journal of Materiomics, 2019, 5(2): 273-279. https://doi.org/10.1016/j.jmat.2019.02.004

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Received: 29 October 2018
Revised: 04 February 2019
Accepted: 12 February 2019
Published: 14 February 2019
© 2019 The Chinese Ceramic Society. Production and hosting by Elsevier B.V.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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