Affiliation:
1. Institute of Metallurgy, Ural Branch, Russian Academy of Sciences
Abstract
The viscosity of potassium–boron melts is measured in the temperature range 918–1699 K using a vibrational viscosimeter. The content of potassium oxide is varied from 0.74 to 28.46 mol %. The parameters of the viscous flow in melts (the configuration–activation energy(εh) and the shifting energy of the bridging oxygen atoms’ bonds (U∞)) using the configuration–activation model are calculated for two temperature intervals 918–1400 K and 1400–1699 K. The glass transition temperature (Tg) is measured by differential scanning calorimetry (DSC) and the concentration dependence of the glass transition temperature on the content of potassium oxide in the melt is shown.
Publisher
The Russian Academy of Sciences
Reference21 articles.
1. Nakashima K., Kawagoe T., Ookado T., Mori K. Viscosity of Binary Borate and Ternary Borosilicate Melts. // Slags, Fluxes and Salts. Conference.1997. P. 215.
2. Воларович М.П., Фридман P.C. Исследование вязкости системы K2В4O7–В2O3 в расплавленном состоянии // Журн. Физической Химии. 1937. Т. 9. № 2. С. 177–181.
3. Brosh I.E., Pelton A.D., Decterov S.A. A model to calculate the viscosity of silicate melts Part IV: Alkali-free borosilicate melts // International J. Materials Research (formerly Zeitschrift fuer Metallkunde). 2012. V. 103. № 5. P. 494.
4. Coughanour L.W., Shartsis L., Shermer H.F. Viscosity, Density, and Electrical Resistivity of Molten Alkaline-Earth Borate Glasses with 3 Mol. % of Potassium Oxide // J. American Ceramic Society. 1958. V. 41. № 8. P. 324–329.
5. Shartsis L., Capps W., Spinner S. Density, Expansivity, and Viscosity of Molten Alkali Silicates // J. American Ceramic Society. 1953. V. 36. № 10. P. 319–326.