Raman studies of the phase separation mechanism of CaO-Al2O3-SiO2 glasses in an electric field

The effects of an electric field on phase separation in CaO-Al2O3-SiO2 (CAS ) has been studied by Raman spectroscopy. It was discovered that an electri c field can promote the process of phase separation in CAS glasses, The dro plet phase is the enriched section for Ti4+ and Ca2+ ions. The continuous m atrix is the enriched section for Si4+. The results of Raman spectroscopy i ndicate that the electric-field treatment can increase the concentrations o f Q([2]) and Q([4]) in CAS glasses and that increase in concentration near the cathode is higher than that near the anode. The increase in Q([2]) and Q([4]) units is due to the increase of the concentration of Of and Ob On th e basis of experimental results, the mechanism of phase separation of CAS g lass in an electric field has been proposed.