Thermodynamic model and structure of CaO.P2O5 glasses

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F13%3A43896848" target="_blank" >RIV/60461373:22310/13:43896848 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s10973-013-2988-4" target="_blank" >http://dx.doi.org/10.1007/s10973-013-2988-4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10973-013-2988-4" target="_blank" >10.1007/s10973-013-2988-4</a>

Result language
angličtina
Original language name
Thermodynamic model and structure of CaO.P2O5 glasses
Original language description
The distribution of Q-units of CaO-P2O5 glasses was described by the thermodynamic model of Shakhmatkin and Vedishcheva. The glass was considered as the ideal solution of CaO, P2O5, CaP2O6, Ca2P2O7, and Ca3P2O8. In the first step, molar Gibbs energies ofconsidered species were taken from the FACT thermodynamic database. The obtained result was compared with P-31 solid-state NMR study of Roiland. It was shown that the calculated values were in fairly good agreement with the experimental values. After that, the nonlinear regression treatment was used for optimization of molar Gibbs energies by minimizing the sum of squares of deviations between experimental and calculated Q-distribution. In such a manner, the non-ideality of the system was reflected. Inthe studied case, no significant improvement of obtained results was achieved by this procedure-thus, the ideal solution assumption included in the thermodynamic model of Shakhmatkin and Vedishcheva holds very well for the studied binary
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JH - Ceramics, fire-proof materials and glass
OECD FORD branch
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Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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