2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 3: Non-ferrous & Iron_Steel
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 522 pages |
| ISBN: | 978-1-987820-05-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Thermodynamics of borosilicate melts studied by high temperature mass spectrometry
Valentina Stolyarova1;1SAINT PETERSBURG STATE UNIVERSITY, Saint Petersburg, Russian Federation;
Type of Paper: Regular
Id Paper: 222
Topic: 3
Abstract:
The advantages of high temperature mass spectrometric method to study thermodynamic properties and vaporization processes of ternary borosilicate melts are here illustrated. The understanding of high temperature behavior of borosilicate melts has the great importance for the development of the modern materials science as well as for various technologies, such as for the incorporation of nuclear wastes, for obtaining metals from slags in metallurgy and for preparation the special glasses. The information on the vaporization processes and thermodynamic properties of ternary borosilicate melts containing Bi2O3, MgO, CaO, SrO, BaO, PbO, ZnO, and CdO, obtained by high temperature mass spectrometric method in the temperature range 1100-2000 K was considered. The regularities of the vaporization of corresponding binary and ternary borosilicate melts, according to the position of oxide modifier in the Periodic table of atoms were also illustrated and discussed from the point of view of the acid-base concept. Thermodynamic functions of these systems, such as activities and chemical potentials of components as well as the Gibbs energies showed various signs of the deviations from the ideal behavior. For the melts under consideration thermodynamic properties' modeling, the generalized lattice theory of associated solutions was used. Using these approaches, the different levels of deviation from the ideality in the borosilicate melts studied were clarified. The present study was done according to the financial support of the Russian Foundation for Basic Research according to Project N 13-03-00718.