Effect of niobium oxide additions on the electrical conductivity of UO sub 2

Effect of niobium oxide additions on the electrical conductivity of UO sub 2

The electrical conductivity and Seebeck coeff. of Nb sub 2 O sub 5 -doped UO sub 2 were measured. Nb is a donor impurity but not completely ionized and does not result in n-type extrinsic conduction. Intrinsic conduction is attributed to Nb compensation of acceptor levels due to slight excess O in n...

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Veröffentlicht in:Journal of nuclear materials 1980-01, Vol.88 (2), p.185-192
1. Verfasser: Killeen, J C
Format: Artikel
Sprache:eng
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Zusammenfassung:The electrical conductivity and Seebeck coeff. of Nb sub 2 O sub 5 -doped UO sub 2 were measured. Nb is a donor impurity but not completely ionized and does not result in n-type extrinsic conduction. Intrinsic conduction is attributed to Nb compensation of acceptor levels due to slight excess O in nearly stoichiometric UO sub 2. The band gap in UO sub 2 is 2.14 eV for doped UO sub 2 and 2.26 eV for undoped UO sub 2. Extrinsic UO sub 2 conductivity due to hopping polarons is 0.14 eV.
ISSN:0022-3115