The phase equilibria in the Cs2O-B2O 3-SiO2 system are investigated in the temperature range 873-1073 K by the annealing-quenching technique, high-temperature microscopy, and X-ray powder diffraction analysis. The vapor composition, the activities of the components, and the Gibbs energies of glasses and melts in the Cs 2O-B2O3-SiO2 system are determined at a temperature of 1020 K. It is demonstrated that glasses and melts in the Cs2O • B2O3-Cs2O • SiO2 system are characterized by positive deviations of the CsBO 2 activities and negative deviations of the Cs2O • SiO2 activities from ideal behavior. As a consequence, the deviations of the Gibbs energies from ideal behavior change their sign.

Original languageEnglish
Pages (from-to)55-62
Number of pages8
JournalGlass Physics and Chemistry
Volume32
Issue number1
DOIs
StatePublished - 1 Jan 2006

    Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

ID: 52739562