Abstract
The phase equilibria in the Cs2O-B2O3-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 Cs2O-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 CsBO2 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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Polyakova, I.G., Alkali Borosilicate Systems: Phase Diagrams and Properties of Glasses, Phys. Chem. Glasses, 2000, vol. 41, no. 5, pp. 247–257.
Hübner, R., Belger, A., Meyer, D.C., Paufler, P., and Polyakova, I.G., Crystallisation of Caesium Borosilicate Glasses with Approximate Boroleucite Composition, Z. Kristallogr., 2002, vol. 217, pp. 223–232.
Akimov, V.V., Properties of Rubidium, Cesium, and Lithium Cesium Borosilicate Glasses, Fiz. Khim. Stekla, 1989, vol. 15, no. 5, pp. 753–757.
Feller, S.A., Kottke, J., Welter, J., et al., Physical Properties of Alkali Borosilicate Glasses, in Borate Glasses, Crystals, and Melts (Proceedings of the II International Conference “Borate Glasses”), 1997, pp. 246–253.
Galakhov, F.Ya., Aver’yanov, V.I., Vavilonova, V.T., and Areshev, M.N., Metastable Phase Separation Regions in the K2O (Rb2O, Cs2O)-B2O3-SiO2 Systems, Fiz. Khim. Stekla, 1981, vol. 7, no. 1, pp. 38–41.
Kozhina, E.L. and Shultz, M.M., Thermodynamic Properties of Cesium Borate and Cesium Borosilicate Melts, Proceedings of the XVIII International Congress on Glass, San Francisco, 1998, CD-ROM, p. AB89.
Asano, M., Kou, T., and Yasue, Y., Mass Spectrometric Study of Vaporization of Cesium-Containing Borosilicate Glasses, Non-Cryst. Solids, 1987, vol. 92, nos. 2–3, pp. 245–260.
Toropov, N.A., Barzakovskii, V.P., Lapin, V.V., and Kurtseva, N.N., Diagrammy sostoyaniya silikatnykh sistem. Spravochnik. Dvoinye sistemy (A Handbook on Phase Diagrams of Silicate Systems: Binary Systems), Leningrad: Nauka, 1969, pp. 166–167.
Rumyantsev, P.F., Application of a High-Temperature Microscope to Examination of Silicates, in Silikaty i okisly v khimii vysokikh temperatur (Silicates and Oxides in High-Temperature Chemistry), Budnikov, P.P., Ed., Moscow, 1963, pp. 41–50.
Stolyarova, V.L., Lopatin, S.I., Sycheva, G.A., and Plotnikov, E.N., Mass Spectrometric Study of the Thermodynamic Properties of Melts in the Cs2O-B2O3 System, Fiz. Khim. Stekla, 2005, vol. 31, no. 6 [Glass Phys. Chem. (Engl. transl.), 2005, vol. 31, no. 6, pp. 789–796].
Paule, R.C. and Mandel, J., Analysis Interlaboratory Measurements on the Vapour Pressure of Cadmium and Silver, Pure Appl. Chem., 1972, vol. 31, no. 3, pp. 397–431.
Energii razryva khimicheskikh svyazei. Potentsialy ionizatsii i srodstvo k elektronu. Spravochnik (A Handbook on Dissociation Energies of Chemical Bonds: Ionization Potentials and Electron Affinity), Kondrat’ev, V.N., Ed., Moscow: Nauka, 1974.
Asano, M., Yasue, Y., and Kubo, K., Mass Spectrometric Study of Ions Formed from Cesium Metaborate Vapor under Electron Impact, J. Nucl. Sci. Technol., 1984, vol. 21, no. 8, pp. 614–624.
Makarov, A.V. and Nikitin, O.T., On the Problem of Identifying Mass Spectra of Alkali Metal Metaborate Vapors, Teplofiz. Vys. Temp., 1971, vol. 9, no. 5, pp. 1073–1075.
Gorokhov, L.N., Gusarov, A.V., Makarov, A.V., and Nikitin, O.T., A Mass Spectrometric Study of the Vaporization of Alkali Metal Metaborates, Teplofiz. Vys. Temp., 1971, vol. 9, no. 6, pp. 1173–1176.
Asano, M., Harada, T., and Mizutani, Y., Mass Spectrometric Properties in the RbBO2-SiO2 System, J. Mass Spectrom. Soc. Jpn., 1996, vol. 44, no. 1, pp. 21–27.
Author information
Authors and Affiliations
Additional information
Original Russian Text © V.L. Stolyarova, S.I. Lopatin, O.L. Belousova, L.V. Grishchenko, 2006, published in Fizika i Khimiya Stekla.
Rights and permissions
About this article
Cite this article
Stolyarova, V.L., Lopatin, S.I., Belousova, O.L. et al. Phase equilibria and thermodynamic properties of components in the Cs2O-B2O3-SiO2 system at high temperatures. Glass Phys Chem 32, 55–62 (2006). https://doi.org/10.1134/S108765960601007X
Received:
Issue Date:
DOI: https://doi.org/10.1134/S108765960601007X