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Electrical Conductivity of Uranium Dioxide
Author(s) -
BATES J. L.,
HINMAN C. A.,
KAWADA T.
Publication year - 1967
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1967.tb15021.x
Subject(s) - electrical resistivity and conductivity , uranium dioxide , activation energy , stoichiometry , conductivity , uranium , analytical chemistry (journal) , materials science , thermal conduction , crystallite , mineralogy , chemistry , thermodynamics , physics , metallurgy , composite material , chromatography , quantum mechanics
The electrical conductivity of nearly stoichiometric single‐crystal and polycrystalline uranium dioxide was measured from room temperature to 3000°K. Below approximately 550°K, the curve of log σ versus T −1 is linear with a calculated activation energy of approximately 0.17 ev. Between 550° and 1250°K, however, the shape of the curve changes; this change varies from one specimen to another. The electrical conductivity increases rapidly with increasing temperature above 1250°K with a change from p ‐type to n ‐type conduction. The best linear fit of the log σ versus T −1 curve above 1400°K is σ= 3.57 × 10 3 e −(1.15 ev/KT) . Above 1900°K, the curve deviates slightly from linearity and is best fit by the equation σ= 2.10 × 10 −2 T 1.4 e −(0.916 ev/KT) .