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Interceram - International Ceramic Review

, Volume 68, Issue 3, pp 32–39 | Cite as

Interactions in Two-Phase Systems of MgO(s)-(Na2O-SiO2)(l)

  • P. VadászEmail author
  • B. Plešingerová
  • J. Briančin
  • G. Sučik
  • D. Medveď
Research and Development
  • 6 Downloads

Abstract: The corrosion drop tests were carried out on periclase plates MgO(s) by hot-melt testing of Na2O·2SiO2(l) (ratio of Na:Si = 1:1) in the viewing field of a high-temperature microscope. The corrosion tests at a temperature of 1300 °C lasted for 30, 60 and 120 min in air atmosphere. The corrosion of MgO(s) was evaluated by the SEM (scanning electron microscopy) method with local semi-quantitative EDX microanalysis. The attack on periclase crystal by the Na2O-SiO2 hot melt caused a penetration of the Na+ cations in MgO. Locally defective areas in periclase were observed up to a depth of 150-200 μm. The original cubic structure of periclase was deformed because of the differences in the ion size between Na+ and Mg2+. Silicon atoms were not detected. The Si4+ ions were fixed-bound in anion complexes ([SinO3n+1]-2(n+1)) in the melt.

Copyright information

© Springer Fachmedien Wiesbaden GmbH 2019

Authors and Affiliations

  • P. Vadász
    • 1
    Email author
  • B. Plešingerová
    • 1
  • J. Briančin
    • 2
  • G. Sučik
    • 1
  • D. Medveď
    • 1
  1. 1.Institute of MetallurgyTechnical University of KošiceKošiceSlovakia
  2. 2.Institute of GeotechnicsSlovak Academy of SciencesKošiceSlovakia

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