Interdiffusivity measurements in oxide systems by solid state galvanic cell method
2004 (English)In: Proceedings of the TMS Fall Extraction and Processing Conference, 2004, 87-99 p.Conference paper (Refereed)
A galvanic cell method incorporating ZrO2-CaO solid electrolyte was successfully developed in the present laboratory. This technique has the advantage of monitoring of interdiffusion in oxide systems continuously. A typical cell in case of the study of the interdiffusivities in the system MO-NO can be written as (-) Pt, M (s), MO,NO (s) // ZrO2-CaO // MO (s), M (s), Pt (+) where the oxide in the left-hand electrode is initially a mechanical mixture of the two oxides. As the interdiffusion proceeded, the EMF followed a typical S-type diffusion curve, starting from zero tending towards thermodynamic equilibrium. The results were treated by a model based on Dunwald-Wagner relationship in order to evaluate the diffusivities. The method was applied to NiO-MgO solid solutions as well as interdiffusion between NiO and CoO-doped MgO. The results compare well with the results of diffusion couple experiments as well as dynamic high temperature X-ray studies.
Place, publisher, year, edition, pages
2004. 87-99 p.
, Proceedings of the TMS Fall Extraction and Processing Conference, 2004
Diffusion, Galvanic cell
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-157459ScopusID: 2-s2.0-2942617052OAI: oai:DiVA.org:kth-157459DiVA: diva2:770329
Extraction and Processing Division Congress 2004, 14 March 2004 through 18 March 2004, Charlotte, NC
QC 201412102014-12-102014-12-092014-12-10Bibliographically approved