Go to the Indico Home Page Oldest event Older event Up to category Newer event Newest event
  • Indico style
  • Indico style - inline minutes
  • Indico style - numbered
  • Indico style - numbered + minutes
  • Indico Weeks View
    • Switch to the management area of this event
    Login

    EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

    13–17 Sept 2021 Virtual Conference
    Virtual
    Europe/Vienna timezone
    Thank you very much for your participation!

    Conference Secretary

    Investigation of the properties of the Al2O3 co-doped ScSZ thin films

    Not scheduled
    3m
    Virtual

    Virtual
    Poster E6. Materials for hydrogen technologies E6_Poster Session

    Speaker

    Dr Kristina Bockute (Kaunas University of Technology, Physics Department)

    Description

    Scandia stabilized zirconia (ScSZ) is a widely investigated material due to its thermal stability, mechanical properties, high electrochemical characteristics, and low cost which make ScSZ an ideal candidate for applications in solid oxide fuel cells, electrochemical oxygen gas sensors, oxygen pumps, etc.
    The optimal composition maintaining cubic phase structure at low temperatures is one of the most crucial characteristics of ScSZ for their application in solid oxide fuel cells. The addition of divalent or trivalent cations, such as Sc2O3, to the host lattice of (Zr4+), not only stabilizes the cubic phase but also increase the concentration of oxygen vacancies which enhance ionic conductivity. Sometimes, small concentrations (1–2 mol %) of additional dopants (co-doping) are used to increase the concentration of scandia in ZrO2, maintaining cubic structure at the same time. Rare-earth elements or their oxides, such as CeO2, Gd2O3, Sm2O3, Bi2O3, Yb2O3, and Al2O3, are good candidates to be co-dopants for ScSZ structures. For example, co-doping by Al2O3 can lead to a change in the structure, influencing mechanical and electrical properties. Besides, the different fabrication methods and their chosen technological parameters determine the ionic conductivity of co-doped ScSZ.
    In the present study, the influence of the Al2O3 co-doping concentration and different technological parameters on the properties of ScAlSZ were investigated. The electrolytes were formed using e-beam physical vapor deposition by changing deposition rate and substrate temperature during the deposition.
    It was found that the concentration of the Al2O3 co-dopant and technological parameters influenced the ionic conductivity by the resulted differences in microstructure, crystal structure, and phase distribution of co-doped ScSZ.

    Acknowledgments. This project has received funding from European Regional Development Fund (project No 01.2.2-LMT-K-718-01-0071) under grant agreement with the Research Council of Lithuania (LMTLT).

    Speaker Country Lithuania

    Author

    Dr Kristina Bockute (Kaunas University of Technology, Physics Department)

    Co-authors

    Prof. Arvaidas Galdikas (Kaunas University of Technology, Physics Department, Studentu str. 50, LT-51368, Kaunas, Lithuania) Dr Darius Virbukas (Kaunas University of Technology, Physics Department, Studentu str. 50, LT-51368, Kaunas, Lithuania) Prof. Giedrius Laukaitis (Kaunas University of Technology, Physics Department, Studentu str. 50, LT-51368, Kaunas, Lithuania) Dr Mantas Sriubas (Kaunas University of Technology, Physics Department, Studentu str. 50, LT-51368, Kaunas, Lithuania) Mr Nursultan Kainbayev (Kaunas University of Technology, Physics Department, Studentu str. 50, LT-51368 Kaunas, Lithuania; Al-Farabi Kazakh National University, Department of Thermal Physics and Technical Physics, 71 Al-Farabi Ave., 050040 Almaty, Kazakhstan) Dr Teresa Moskalioviene (Kaunas University of Technology, Physics Department, Studentu str. 50, LT-51368, Kaunas, Lithuania)

    Presentation materials

    There are no materials yet.