On the Soret effect in binary nonstoichiometric oxides kinetic demixing of cuprite in a temperature gradient
dc.contributor.author | Timm, H. | |
dc.contributor.author | Janek, Jürgen | |
dc.date.accessioned | 2023-06-12T07:53:54Z | |
dc.date.available | 2005-09-14T09:42:11Z | |
dc.date.available | 2023-06-12T07:53:54Z | |
dc.date.issued | 2005 | |
dc.description.abstract | The Soret effect in nonstoichiometric copper(I)-oxide (cuprite, Cu2-deltaO) has been studied experimentally by means of non-isothermal solid state galvanic cells (thermocells) under different boundary conditions. At high temperatures and high oxygen activities, copper metal migrates down the temperature gradient and a gradient in the nonstoichiometry is established under stationary conditions. The heat of transport of copper metal is determined as Q*Cu is equivalent to 180 kJ/mol at a temperature of 1000 °C and at an oxygen activity of log aO2=-2.95. This result agrees with recent theoretical simulations of the heat of transport of atoms migrating via a vacancy mechanism. These predict a positive sign of the heat of transport and a considerably larger value than the activation energy for the atomic jumps. | en |
dc.identifier.uri | http://nbn-resolving.de/urn:nbn:de:hebis:26-opus-23843 | |
dc.identifier.uri | https://jlupub.ub.uni-giessen.de//handle/jlupub/16728 | |
dc.identifier.uri | http://dx.doi.org/10.22029/jlupub-16106 | |
dc.language.iso | en | de_DE |
dc.rights | In Copyright | * |
dc.rights.uri | http://rightsstatements.org/page/InC/1.0/ | * |
dc.subject.ddc | ddc:540 | de_DE |
dc.title | On the Soret effect in binary nonstoichiometric oxides kinetic demixing of cuprite in a temperature gradient | en |
dc.type | article | de_DE |
local.affiliation | FB 08 - Biologie und Chemie | de_DE |
local.opus.fachgebiet | Chemie | de_DE |
local.opus.id | 2384 | |
local.opus.institute | Physikalisch-Chemisches Institut | de_DE |
local.source.freetext | Zuerst erschienen in: Solid State Ionics 176 (2000) 1131-1143 | de_DE |
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