Abstract
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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Harris, D.C., History of development of polycrystalline optical spinel in the US, Window and Dome Technologies and Materials IX(Orlando 2005), Proc. SPIE, 2005, vol. 5786, pp. 1–22.
Salmones, J., Galicia, J.A., Wang, J.A., Valenzuela, M.A., and Aguilar-Ris, G., Synthesis and characterization of nanocrystallite MgAl2O4 spinels, J. Mater. Sci. Lett., 2000, vol. 19, no. 12, pp. 1033–1037.
Li, W.-Z., Kovarik, L., Mei, D., Liu, J., Wang, Y., and Peden, Ch.H.F., Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high temperatures in oxidizing atmospheres, Nat. Commun., 2013, vol. 4, no. 2481, pp. 1–8.
Djenadic, R., Botros, M., and Hahn, H., Is Li-doped MgAl2O4 a potential solid electrolyte for an all-spinel Li-ion battery?, Solid State Ionics, 2016, vol. 287, pp. 71–76.
Wiglusz, R.J., Boulon, G., Guyot, Y., Cuzik, M., Hreniak, D., and Strek, W., Structural and spectroscopic properties of Yb3+-doped MgAl2O4 nanocrystalline spinel, Dalton Trans., 2014, vol. 43, no. 21, pp. 7752–7759.
Ganesh, I., A review on magnesium aluminate (MgAl2O4) spinel: synthesis, processing and applications, Int. Mater. Rev., 2013, vol. 58, no. 2, pp. 63–112.
Liu, J., Lv, X., Li, J., and Liu, Y., Synthesis of moltenelectrolyte corrosion resistant MgAl2O4–MgAlON sidewall materials by pressureless sintering, J. Alloys Compd., 2016, vol. 687, pp. 623–629.
Raj, S.S., Mishra, D.R., Soni, A., Grover, V., Polymeris, G.S., Muthe, K.P., Jha, S.K., and Tyagi, A.K., TL and OSL studies of carbon doped magnesium aluminate (MgAl2O4:C), Radiat. Phys. Chem., 2016, vol. 127, pp. 78–84.
Kazenas, E.K. and Tsvetkov, Yu.V., Isparenie oksidov (Vaporization of Oxides), Moscow: Nauka, 1997.
Sasamoto, T., Hara, H., and Sata, T., Mass-spectrometric study of the vaporization of magnesium oxide from magnesium aluminate spinel, Bull. Chem. Soc. Jpn., 1981, vol. 54, pp. 3327–3333.
Chase, M.W.J., NIST–JANAF thermochemical tables, J. Phys. Chem. Ref. Data, 1998, monograph 9.
Glushko, V.P., Termicheskie konstanty veshchestv: Spravochnik (Thermal Constants of Substances: A Handbook), Moscow: VINITI,1979, issue IX.
Zienert, T. and Fabrichnaya, O., Thermodynamic assessment and experiments in the system MgO–Al2O3, CALPHAD: Comput. Coupling Phase Diagrams Thermochem., 2013, vol. 40, pp. 1–9.
Navrotsky, A. and Kleppa, O.J., Thermodynamics of formation of simple spinels, J. Inorg. Nucl. Chem., 1968, vol. 30, no. 2, pp. 479–498.
Gribchenkova, N.A., Steblevsky, A.V., and Alikhanyan, A.S., Vaporization thermodynamics of the ZnO–SnO2 system, J. Chem. Thermodyn., 2014, vol. 70, pp. 203–206.
Mori, T., Solubility of Al2O3 in MgO, J. Ceram. Soc. Jpn., 1981, vol. 90, no. 1045, pp. 551–552.
Drowart, J., De Maria, G., and Inghram, M.G., Thermodynamic study of Al2O3 using a mass spectrometer, J. Chem. Phys., 1958, vol. 29, no. 5, pp. 1015–1021.
Charlu, T.V., Newton, R.C., and Kleppa, O.J., Enthalpies of formation at 970 K of compounds in the system MgO–Al2O3–SiO2 from high temperature solution calorimetry, Geochim. Cosmochim. Acta, 1975, vol. 39, no. 11, pp. 1487–1497.
Shearer, J.A. and Kleppa, O.J., The enthalpies of formation of MgAl2O4,MgSiO3,Mg2SiO4 and Al2SiO5 by oxide melt solution calorimetry, J. Inorg. Nucl. Chem., 1973, vol. 35, no. 4, pp. 1073–1078.
Fujii, K., Nagasaka, T., and Hino, M., Activities of the constituents in spinel solid solution and free energies of formation of MgO, MgO · Al2O3, ISIJ Int., 2000, vol. 40, no. 11, pp. 1059–1066.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © N.A. Gribchenkova, K.G. Smorchkov, A.G. Kolmakov, A.S. Alikhanyan, 2017, published in Neorganicheskie Materialy, 2017, Vol. 53, No. 5, pp. 518–523.
Rights and permissions
About this article
Cite this article
Gribchenkova, N.A., Smorchkov, K.G., Kolmakov, A.G. et al. Vaporization in the Al2O3–MgO system. Inorg Mater 53, 514–518 (2017). https://doi.org/10.1134/S0020168517050077
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0020168517050077