Electronic transport in pure and doped UO2

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Electronic transport in pure and doped UO2

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Publication Article, peer reviewed scientific
Title Electronic transport in pure and doped UO2
Author Massih, Ali R
Date 2017
English abstract
The thermoelectric properties of pure and doped UO2, namely the thermal and electrical conductivities and the thermopower, are assessed. We adopt the small polaron theory of the Mott type insulators, wherein the charge carriers, the electron and hole on the U3+ and U5+ ions, are treated as small polarons. For the thermal conductivity, the small polaron theory is applicable at temperatures above 1500 K. A review of the experimental data on the temperature dependence of the aforementioned transport properties is made. The data include UO2 with dopants such as Cr2O3, Gd2O3, Y2O3 and Nb2O5. We compare the applications of the theory with the data. Two limiting regimes, adiabatic and nonadiabatic, with the ensuing expressions for the conductivities and the thermoelectric power are considered. We discuss both the merits and shortcomings of the putative small polaron model and the simplification thereof as applied to pure and doped uranium dioxide. (C) 2017 Elsevier B.V. All rights reserved.
DOI https://doi.org/10.1016/j.jnucmat.2017.07.035 (link to publisher's fulltext.)
Publisher Elsevier
Host/Issue Journal of Nuclear Materials;
Volume 497
ISSN 0022-3115
Pages 17
Page 166-182
Language eng (iso)
Subject Materials Science, Multidisciplinary
Nuclear Science & Technology
Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/27334 Permalink to this page
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