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Interdiffusivity measurements in oxide systems by solid state galvanic cell method
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0002-3548-8638
KTH, Superseded Departments, Materials Science and Engineering.
2004 (English)In: Proceedings of the TMS Fall Extraction and Processing Conference, 2004, 87-99 p.Conference paper, Published paper (Refereed)
Abstract [en]

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.
Series
Proceedings of the TMS Fall Extraction and Processing Conference, 2004
Keyword [en]
Diffusion, Galvanic cell
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-157459Scopus ID: 2-s2.0-2942617052OAI: oai:DiVA.org:kth-157459DiVA: diva2:770329
Conference
Extraction and Processing Division Congress 2004, 14 March 2004 through 18 March 2004, Charlotte, NC
Note

QC 20141210

Available from: 2014-12-10 Created: 2014-12-09 Last updated: 2016-12-16Bibliographically approved

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Sicben, Du

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  • apa
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  • vancouver
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