Journal article

Authors list: Janek, J; Korte, C

Publication year: 1996

Pages: 187-208

Journal: Zeitschrift für Physikalische Chemie

Volume number: 196

Issue number: 2

ISSN: 0942-9352

DOI Link: https://doi.org/10.1524/zpch.1996.196.Part_2.187

Publisher: De Gruyter

Abstract: 
Matter fluxes are always coupled to heat fluxes, so that temperature gradients not only cause heat fluxes but also induce matter fluxes. In the framework of irreversible thermodynamics, this coupling is expressed by the definition of so-called heats of transport of the mobile components. In mixed conducting solids, the measurable fluxes of ions and electrons are in general composed of contributions of various mobile point defects (structure elements). Thus, the measurable transport coefficients and heats of transport are necessarily a combination of several independent defect properties. For the case of mixed conducting solids with Frenkel and electronic disorder we present a formal analysis of the coupling on the basis of a distinction between structure elements and building units of the crystal. The relations between the measurable transport properties and the a priori not measurable point defect properties are derived and discussed. Experimental results for two different systems (low-temperature phases alpha-Ag2+deltaS, alpha-Ag2+deltaSe) are analysed on the basis of our formal results.

Harvard Citation style: Janek, J. and Korte, C. (1996) Cross effect between heat and matter fluxes in mixed conducting solids - Definition of the heats of transport, Zeitschrift für Physikalische Chemie, 196(2), pp. 187-208. https://doi.org/10.1524/zpch.1996.196.Part_2.187

APA Citation style: Janek, J., & Korte, C. (1996). Cross effect between heat and matter fluxes in mixed conducting solids - Definition of the heats of transport. Zeitschrift für Physikalische Chemie. 196(2), 187-208. https://doi.org/10.1524/zpch.1996.196.Part_2.187