Key points are not available for this paper at this time.
The effect of BaO and Al 2 O 3 on the viscosity of SiO 2 –CaO–MgO–Al 2 O 3 –BaO slag from 1673 to 1873 K is studied by the rotating cylinder method. The structure of slag is examined by Raman spectroscopy and molecular dynamics simulation. In this study of viscosity, Al 2 O 3 shows amphoteric oxide characteristics and BaO shows characteristics different from the basic oxide. The viscosity increases as the BaO increases from 2 to 4 wt% in the slag with CaO/SiO 2 = 1.07. However, the viscosity decreases when the BaO content increases from 6 to 8 wt%. From molecular dynamics simulations and Raman analysis, the increase in BaO content leads to a greater aggregation of Al around Ba atoms and increases the number of Al–O bonds. This indicates that higher BaO content promotes the polymerization of the AlO 4 tetrahedral structure. Furthermore, a good quantitative relationship between viscosity and the ratio of Q 3 /Q 2 of the Raman spectrum of the slag is observed.
Chen et al. (Mon,) studied this question.