Evaluation of Molar Volume of Silicate Systems Using a Structural Model

A structural based model is proposed to represent the molar volume of silicate melts in terms of both temperature and composition. The model links the molar volume to the internal structure of melts through the concentrations of non-bridging oxygen present in the slag. A previous proposed structural...

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Bibliographic Details
Published in:Glass physics and chemistry 2019-05, Vol.45 (3), p.195-201
Main Authors: Antonio Romero-Serrano, López-Rodríguez, Josué, Hernández-Ramírez, Aurelio, Pérez-Labra, Miguel, Cruz-Ramírez, Alejandro
Format: Article
Language:English
Subjects:
Binary systems
Calcium oxide
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Glass
Linear functions
Magnesium oxide
Manganese oxides
Materials Science
Melts
Molar volume
Natural Materials
Oxygen ions
Parameters
Physical Chemistry
Silicon dioxide
Temperature
Ternary systems
Thermodynamic models
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Summary:A structural based model is proposed to represent the molar volume of silicate melts in terms of both temperature and composition. The model links the molar volume to the internal structure of melts through the concentrations of non-bridging oxygen present in the slag. A previous proposed structural thermodynamic model is used to calculate the content of oxygen ions. The molar volume model requires only one or two parameters to obtain a good agreement between experimental and calculated data for the SiO 2 –Na 2 O, SiO 2 –CaO, SiO 2 –MgO, SiO 2 –MnO, and SiO 2 –PbO binary systems. The molar volume of ternary systems is calculated with the model assuming a linear function of the parameters from binary systems; however, the content of non-oxygen bridges is calculated using the thermodynamic model for ternary systems. Comparison is made between the experimental and model results for the SiO 2 –CaO–MnO, SiO 2 –Na 2 O–PbO and SiO 2 –CaO–MgO systems.
ISSN:1087-6596
1608-313X
DOI:10.1134/S1087659619030088