Glass Physics and Chemistry

, Volume 35, Issue 2, pp 199–204

Behavior of melts in the UO2-SiO2 system in the liquid-liquid phase separation region


  • Yu. B. Petrov
    • St. Petersburg Electrotechnical University (LETI)
    • St. Petersburg State Institute of Technology (Technical University)
  • J. Subrt
    • Institute of Inorganic ChemistryASCR
  • S. Bakardjieva
    • Institute of Inorganic ChemistryASCR
  • P. Sazavsky
    • Nuclear Research Institute Rez plc
  • M. Kiselova
    • Nuclear Research Institute Rez plc
  • P. Selucky
    • Nuclear Research Institute Rez plc
  • P. Bezdicka
    • Institute of Inorganic ChemistryASCR
  • C. Jorneau
    • CEA, DEN, DTN/STRI/LMA, F13108
  • P. Piluso
    • CEA, DEN, DTN/STRI/LMA, F13108

DOI: 10.1134/S1087659609020126

Cite this article as:
Petrov, Y.B., Udalov, Y.P., Subrt, J. et al. Glass Phys Chem (2009) 35: 199. doi:10.1134/S1087659609020126


The behavior of melts in the uranium oxide-silicon dioxide system is experimentally investigated in air upon induction melting in a “cold crucible.” The existence of the two-phase liquid region in this system is confirmed. It is demonstrated that the melts absorb oxygen from air, which leads to crystallization of the UO2.25 compound upon cooling. In the case of considerable internal heat release, sharp cooling of the melt surface results in the liberation of gas, which brings about bulging and, sometimes, melt ejection from the crucible.

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© Pleiades Publishing, Ltd. 2009