Thermodynamic properties of selected phases in the MgO-Sb-O, CaO-Te-O, Pt-Te-O, and Al2O3-Cu-O systems by the EMF method

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School of Chemical Technology | Doctoral thesis (article-based) | Defence date: 2017-02-03
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Date

2017

Department

Materiaalitekniikan laitos
Department of Materials Science and Engineering

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Mcode

Degree programme

Language

en

Pages

57 + app. 40

Series

Aalto University publication series DOCTORAL DISSERTATIONS, 5/2017

Abstract

Most of the non-ferrous metals are produced from sulfide ores. The high grade ores have been exhausted due to intensive consumption and increasing global demand of the metals. The available ores are getting poorer in metals and becoming increasingly more complex. Complexity of the primary raw materials is associated with continuously changing composition, presence of harmful impurities as well as valuable elements with significant concentrations. Furthermore, the secondary raw materials, such as various wastes of electrical and electronic equipment are very complex too. Therefore, efficient processing of such materials, troubleshooting, improving, and developing of industrial processes requires carefully acquired thermodynamic properties for modelling equilibria of chemical reactions and the phase stabilities. In this study, thermodynamic properties of selected phases in the MgO-Sb-O, CaO-Te-O, Pt-Te-O, and Al2O3-Cu-O systems were determined accurately by the solid state EMF method, applying the state-of-the-art equipment. Particular attention was paid to the accuracy and precision of temperature and EMF measurements in carefully arranged experimental galvanic cells. The thermodynamic data reported in the present work should be of great interest for extractive metallurgy as well as for development of new composite and functional materials and product developing work in the field of energy technology, geochemistry and other materials science applications.

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Supervising professor

Taskinen, Pekka, Prof., Aalto University, Department of Materials Science and Engineering, Finland

Thesis advisor

Taskinen, Pekka, Prof., Aalto University, Department of Materials Science and Engineering, Finland

Keywords

equilibrium, electrochemistry, oxygen concentration cells, solid electrolytes, Gibbs energy

Other note

Parts

  • [Publication 1]: D. Sukhomlinov, M. Aspiala, P. Taskinen, Thermodynamic study of MgO-Sb2O3 system and the stability functions of magnesium antimonite, Journal of Chemical Thermodynamics, 72 (2014) 71-76.
    DOI: 10.1016/j.jct.2013.12.032. View at publisher
  • [Publication 2]: D. Sukhomlinov, F. Tesfaye, P. Taskinen, Thermodynamic stability of Ca3TeO6 determined by a solid electrolyte EMF method, Thermochimica Acta, 615 (2015) 38-42.
    DOI: 10.1016/j.tca.2015.07.001. View at publisher
  • [Publication 3]: Dmitry Sukhomlinov, Pekka Taskinen, Thermodynamic properties of intermetallic PtTe determined by means of a solid electrolyte EMF method, Journal of Chemical Thermodynamics, 93 (2016) 19-23.
    DOI: 10.1016/j.jct.2015.09.007. View at publisher
  • [Publication 4]: Dmitry Sukhomlinov, Fiseha Tesfaye, Niko Hellstén, Daniel Lindberg, Pekka Taskinen, Thermodynamic stability of solid phases in the system Cu-O-Al2O3 by means of the EMF and DSC-TGA techniques, Journal of Solid State Electrochemistry, ahead of print.
    DOI: 10.1007/s10008-016-3430-1. View at publisher

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https://urn.fi/URN:ISBN:978-952-60-7242-5

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[diss] Kemian tekniikan korkeakoulu / CHEM