Effect of composition and temperature on viscosity and electrical conductivity of borosilicate glasses for Hanford nuclear waste immobilization

摘要

Viscosity and electrical conductivity of 79 simulated borosilicate glasses in the expected range of compositions to be produced in the Hanford Waste Vitrification Plant were measured within the temperature span from 950 to 1250(degree)C. The nine major oxide components were SiO(sub 2), B(sub 2)O(sub 3), Li(sub 2)O, Na(sub 2)O, CaO, MgO, Fe(sub 2)O(sub 3), Al(sub 2)O(sub 3), and ZrO(sub 2). The test compositions were generated statistically. The data were fitted by Fulcher and Arrhenius equations with temperature coefficients being multilinear functions of the mass fractions of the oxide components. Mixture models were also developed for the natural logarithm of viscosity and that of electrical conductivity at 1150(degree)C. Least squares regression was used to obtain component coefficients for all the models.