A Raman spectral study has been carried out on the structures of glassy and transparent CaO-MeO- SiO2 ternary slags (MeO : Li2O, Na2O, K2O, MgO, SrO, and BaO), and of glassy and dark colored MnO-SiO2 and FeO-SiO2 slags.
Main Raman peaks are observed at the certain wavenumber shifts in all meta-or ortho-silicates of CaO-MeO-SiO2 ternary system, and degrees of the shift do not depend on the species of alkali or alkaline earth elements, but do on the composition of a basic oxide. As a result, the structures of the ternary slags can be deduced from those of the binary ones.
A back scattering method is applied for the measurement of dark colored samples, MnO-SiO2 and FeO-SiO2 slags, which has not been carried out yet, and clear Raman spectra are successfully obtained.
Relation between variations in the Raman spectra and thermodynamic stabilities of silicates or ionic properties of oxides is discussed.
