TRANSPORT PROCESSES IN TEMPERATURE-GRADIENTS - THERMAL-DIFFUSION AND SORET EFFECT IN CRYSTALLINE SOLIDS

Authors
KORTE C JANEK J TIMM H
Citation
C. Korte et al., TRANSPORT PROCESSES IN TEMPERATURE-GRADIENTS - THERMAL-DIFFUSION AND SORET EFFECT IN CRYSTALLINE SOLIDS, Solid state ionics, 101, 1997, pp. 465-470
Citations number
19
Journal title
Solid state ionics → ACNP
ISSN journal
01672738
Volume
101
Year of publication
1997
Part
1
Pages
465 - 470
Database
ISI
SICI code
0167-2738(1997)101:<465:TPIT-T>2.0.ZU;2-O
Abstract
The redistribution of a mobile component in a mixed conductor of the t ype A(1-delta)X(nu) in a temperature gradient is governed by the ratio of the heat of transport of the mobile component and the thermodynami c factor. Both quantities exhibit extrema at or close to the stoichiom etric composition. As a consequence, the resulting thermal segregation factor (d delta/dT)(j=0) shows a strong composition dependence. We pr esent a formal description which allows the prediction of (d delta/dT) (j=0) and discuss experimental results.