Comparative Roles of Al~3+ and Fe~3+ Ions for Network Construction in Sodium Silicate Melts

摘要

The Raman spectra of Na_2-O-Al_2O_3-SiO_2 system with different Al_2O_3 contents (up to 25 mol /100) and with Na_2O/SiO_2 ratio from 1 to 2 have been measured at 1673 K. In the disilicate systems, the Rama spectra do not change significantly with increasing of Al_2O_3 content Except the development of the 500 cm~-1 band which is assigned to the three-dimensional network structur- Al unit consisted of Si~4+ and Al~3+ ions. Also it is found that Al~3+ ions possible interact with monomers and Form three-dimensional structures.