TITLE

Ionic Wiedemann-Franz law

AUTHOR(S)
Scott, J. F.; Scott, J.F.; Bohn, H. G.; Bohn, H.G.; Schenk, W.
PUB. DATE
October 2000
SOURCE
Applied Physics Letters;10/16/2000, Vol. 77 Issue 16
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The Wiedemann-Franz law for electron transport in metals was historically a linch pin for the free-electron theory of metals; it states that, at moderately low temperatures, the ratio of thermal conductivity K to electrical conductivity σ is proportional to absolute temperature, with a proportionality constant called "the Lorenz number" of L=2.45x10[sup -8] W Ω/K[sup 2]. Here we describe work on yttrium-stabilized zirconia in which we have found that a similar relationship is valid above 1350 K, where nearly all the electrical conduction and thermal conduction arise from ionic currents. © 2000 American Institute of Physics.
ACCESSION #
4433208

 

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