Heat capacities of 15Na2O·10(MgO, CaO, TiO2, ZrO2)·75SiO2 glasses
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Heat capacitiesCp of title glasses were measured for temperature ranging from 50 to 550°C. True linear temperature dependences were observed for all studied glasses at temperatures sufficiently lower than the glass transition temperature. The temperature-compositionalCp dependence was described by the linear model with only statistically significant coefficients retained. The parameters were estimated using the standard least squares procedure. The results obtained may be used for evaluation of viscosity values according to Adam and Gibbs theory.
Keywordsglasses heat capacity linear model
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- 1.G. Adam and J. H. Gibbs, J. Chem. Phys., 43 (1965) 139.Google Scholar
- 2.M. D. Ingram, Ber. Bunsenges. Phys. Chem., 96 (1992) 1592.Google Scholar
- 3.G. W. Scherer, J. Non-Cryst. Solids, 123 (1990) 75.Google Scholar
- 4.W. Kauzmann, Chem. Rev., 43 (1948) 219.Google Scholar
- 5.P. Richet, R. A. Robie and B. S. Hemingway, Geochim. Cosmochim. Acta, 57 (1993) 2751.Google Scholar
- 6.P. Richet, Rivista della Staz. del Vetro 23 supl. (1993) 35.Google Scholar
- 7.P. Šimurka, PhD Thesis, Inst. Inorg. Chem. Slov. Acad. Sci., Bratislava 1994.Google Scholar
- 8.M. Liška and P. Šimurka, Phys. Chem. Glasses, 36 (1995) 6.Google Scholar
- 9.I. Barin and O. Knacke, Thermochemical properties of inorganic substances. Springer Verlag, Berlin 1973.Google Scholar
- 10.B. O. Mysen, Structure and Properties of Silicate Melts, Elsevier, New York 1988.Google Scholar
- 11.B. O. Mysen and D. Neuville, Geochim. Cosmochim. Acta, 59 (1995) 325.Google Scholar