Raman spectroscopy of the structures of Li2O-SiO2 and Li2O-GeO2 melts

Roles of iron and lithium in silicate glasses by Raman spectroscopy

“…Regarding the position of bands in the region of 600-1,200 cm −1 , many authors have assigned the values as follows. [1,[3][4][5]12,17,20] (1) 750-850 cm −1 corresponds to vibrations due to ortho-silicate (SiO 4 ) or silica tetrahedra assigned as Q 0 . Any other higher wavenumber vibrations are related to the fundamental vibrations of the increasing number of nonbridging oxygen ions formed on account of depolymerisation of the silicate network caused by the increasing concentration of alkali ions.…”

“…Regarding the position of bands in the region of 600-1,200 cm −1 , many authors have assigned the values as follows. [1,[3][4][5]12,17,20] (1) 750-850 cm −1 corresponds to vibrations due to ortho-silicate (SiO 4 ) or silica tetrahedra assigned as Q 0 .…”

“…The practical importance of lithium silicate glass and ceramics has drawn much attention of the researchers to these systems. Lithium di‐silicates as ceramics are the most promising materials for dental restorations, dental crowns, tooth veneers, and so forth on account of its colour being similar to natural teeth and its high mechanical strength …”

“…Lithium di-silicates as ceramics are the most promising materials for dental restorations, dental crowns, tooth veneers, and so forth on account of its colour being similar to natural teeth and its high mechanical strength. [11][12][13][14] The redox states of iron ions in alkali silicate systems have been reported in both Fe 3+ and Fe 2+ forms. However, the fraction of these states varies with the experimental conditions and the method of preparation.…”

The structure of glasses of the LI2O-K2O-GEO2 system revealed by Raman spectroscopy

“…1. Здесь же проведено их сопоставление c ранее полученными спектрами КР бинарных щелочногерманатных стекол, содержащих катионы-модификаторы в том же количестве, 20K и 20Li (Иванова, 2013;Koroleva, Ivanova, 2014 частотной области спектров тройных щелочногерманатных стекол на составляющие. Для этого была использована методика разложения спектров КР бинарных германатов на отдельные линии гауссовской формы (Иванова, 2013).…”