Influence of Tantalum, Niobium, and Tungsten Oxides on the Surface and Bulk Properties of Aluminosilicate Melts

摘要

The maximum gas bubble pressure method was used to study the influence of rare refractory-metal oxides on the surface tension (0) and density p of slags for concentrations of Nb_2O_5, Ta_2O_5, and WO_3 ranging from 0 to 7.4 mol percent or up to 25 wt percent at T = 1523-1873 K. An analysis of the changes in sigma and rho, the temperature coefficients d sigma/dT and d rho/dT, and the adsorption characteristics revealed the complexation behavior of tantalum, niobium, and tungsten in aluminosilicate melts.