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The unique opportunities and features of high temperature mass spectrometric method for study vaporization
processes and thermodynamic properties of oxide systems and materials (glasses, ceramics and coatings) were considered.
Various types of vapour species were found over oxide systems studied such as the associated, dissociated and
polymerized products of vaporization. The regularities of the vaporization of the binary and multicomponent oxide
systems according to the position of oxide modifier in the Periodic table of atoms were illustrated and discussed from the
point of view of the acid-base concept. Results on determination of thermodynamic functions in oxide systems were
considered taking into account the main requirements for the confirmation of their reliability. Thermodynamic functions
of oxide systems studied showed various signs of the deviations from the ideality. The general lattice theory of associated
solutions was used for the calculation of thermodynamic properties of the ternary silicate melts studied. Based on this
theory the correlation between thermodynamic functions obtained in the systems under consideration and the number of
various types of bonds formed in these melts was illustrated. Using this approach the different levels of deviations from
the ideality in the melts studied were clarified. Examples of the practical applications of high temperature mass
spectrometry for developing advanced materials were shown.