Ionic Wiedemann-Franz law

Scott, J. F.; Scott, J.F.; Bohn, H. G.; Bohn, H.G.; Schenk, W.
October 2000
Applied Physics Letters;10/16/2000, Vol. 77 Issue 16
Academic Journal
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.


Related Articles

  • Mixed ionic-electronic conductivity in yttria-stabilized zirconia/carbon nanotube composites. Fonseca, F. C.; Muccillo, R.; de Florio, D. Z.; Ladeira, L. O.; Ferlauto, A. S. // Applied Physics Letters;12/10/2007, Vol. 91 Issue 24, p243107 

    The fabrication of yttria stabilized-zirconia/single-wall carbon nanotube (YSZ/SWCNT) composites is reported. Electrical conductivity measurements from 25 to 800 °C revealed that the composites exhibit mixed ionic-electronic conduction. At room temperature, the conductivity increases by 11...

  • The Mechanism of Ionic Conductivity in Stabilized Cubic Zirconia. Zavodinsky, V.G. // Physics of the Solid State;Mar2004, Vol. 46 Issue 3, p453 

    The electron-density functional method (in the gradient approximation) and the pseudopotential method are used to study the mechanism of ionic conductivity in the cubic phase of zirconia stabilized with magnesium or yttrium. The oxygen-ion migration in the stabilized zirconia is shown to be a...

  • Cation Conductivity of Li8ZrO6–LiYO2 Solid Solutions. Pantyukhina, M.I.; Andreev, O.L.; Martem'yanova, Z.S.; Batatov, N.N. // Inorganic Materials;Apr2004, Vol. 40 Issue 4, p404 

    The Li8ZrO6-LiYO2 system is shown to contain two partial solid-solution series, which extend to 1 mol % LiYO2 in Li8ZrO6 and 10 mol % Li8ZrO6 in LiYO2.The electrical properties (temperature and composition dependences of conductivity, activation energy, and electronic conductivity) of LiYO2 and...

  • Subsurface segregation of yttria in yttria stabilized zirconia. de Ridder, M.; van Welzenis, R. G.; van der Gon, A. W. Denier; Brongersma, H. H.; Wulff, S.; Chu, W.-F.; Weppner, W. // Journal of Applied Physics;9/15/2002, Vol. 92 Issue 6, p3056 

    The segregation behavior in 3 and 10 mol % polycrystalline yttria stabilized zirconia (YSZ), calcined at temperatures ranging from 300 to 1600°C, is characterized using low-energy ion scattering (LEIS). In order to be able to separate the Y and Zr LEIS signals, YSZ samples have been prepared...

  • Characterization of sputtered yttria-stabilized zirconia thin film and its application to a metal-insulator-semiconductor structure. Miyahara, Yuji // Journal of Applied Physics;3/1/1992, Vol. 71 Issue 5, p2309 

    Reports the characterization of sputtered yttria-stabilized zirconia (YSZ) thin film and its application to a metal-insulator-semiconductor structure. Background to the study; Experimental procedures; Structure of the YSZ film; Electrical characteristics of the YSZ film; Conclusion.

  • Oblique ion texturing of yttria-stabilized zirconia: the {211}<111> structure. Berdahl, Paul; Reade, Ronald P.; Liu, Jinping; Russo, Richard E.; Fritzemeier, Les; Buczek, David; Schoop, Urs // Applied Physics Letters;1/20/2003, Vol. 82 Issue 3, p343 

    Amorphous (Zr,Y)O[SUBx] films were synthesized by reactive magnetron sputtering and subsequently crystallized by oblique ion bombardment. Crystalline texture nucleated by the ion beam was replicated by solid-phase epitaxial growth throughout the formerly amorphous yttria-stabilized zirconia...

  • Laser-stimulated luminescence of yttria-stabilized cubic zirconia crystals. Petrik, N.G.; Taylor, D.P. // Journal of Applied Physics;5/1/1999, Vol. 85 Issue 9, p6770 

    Presents information on a study which investigated the kinetics of laser-stimulated luminescence of yttria-stabilized cubic zirconia single crystals. Experimental details; Results and discussion; Conclusions.

  • Epitaxial growth of yttria-stabilised zirconia buffer layers on X-cut LiNbO[sub 3] for superconducting electrodes. Sánchez, F.; García-Cuenca, M.V.; Ferrater, C.; Varela, M. // Applied Physics A: Materials Science & Processing;2002, Vol. 75 Issue 3, p381 

    We report on the epitaxial growth of yttria-stabilised zirconia (YSZ) buffer layers on X-cut LiNbO[sub 3] (LNO) single crystals by pulsed laser deposition. Despite the low chemical stability of the substrates at high temperature, high quality fully reproducible films were obtained over a...

  • Electrical conductivity relaxation in thin-film yttria-stabilized zirconia. Rivera, A.; Santamaría, J.; León, C. // Applied Physics Letters;1/29/2001, Vol. 78 Issue 5, p610 

    We report on complex admittance measurements on ZrO[sub 2]:Y[sub 2]O[sub 3] (YSZ) thin films in the parallel plate geometry. Highly textured YSZ thin films, grown by rf sputtering, allow measuring complex admittance free of the effect of charge blocking at grain boundaries. We have examined...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics