Inorganic Materials

, Volume 53, Issue 5, pp 514–518 | Cite as

Vaporization in the Al2O3–MgO system

  • N. A. Gribchenkova
  • K. G. Smorchkov
  • A. G. Kolmakov
  • A. S. Alikhanyan


The pseudobinary system Al2O3–MgO has been studied in the temperature range 1750–2100 K by the Knudsen effusion method in combination with mass spectrometric analysis of the vapor phase. Over the entire composition range, except for the 100 mol % Al2O3 boundary, the vapor phase over the system consists of three species: Mg, O2, and O. The partial pressures obtained have been used to construct a p–x section through the Al2O3–MgO phase diagram at 1900 K. The standard enthalpy of formation of the MgAl2O4 spinel at 298 K has been determined by third-law calculations:–2301.61 ± 11.00 kJ/mol. We have derived equations for the temperature dependences of the partial pressures of the vapor species over the Al2O3–MgO system.


Al2O3–MgO system MgAl2O4 Knudsen method mass spectrometry partial pressure standard enthalpy 


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© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • N. A. Gribchenkova
    • 1
  • K. G. Smorchkov
    • 1
  • A. G. Kolmakov
    • 2
  • A. S. Alikhanyan
    • 1
  1. 1.Kurnakov Institute of General and Inorganic ChemistryRussian Academy of SciencesMoscowRussia
  2. 2.Baikov Institute of Metallurgy and Materials ScienceRussian Academy of SciencesMoscowRussia

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