Roles of iron and lithium in silicate glasses by Raman spectroscopy

Abstract

Raman spectroscopy has been used in a qualitative analysis of iron containing lithium silicate glasses. The iron was kept fixed at 8 mol% for all the iron containing samples with varying concentrations of Li2O and SiO2, as this resulted in samples that were fully vitreous in nature. The method of deconvolution of peaks in these data has been employed to understand the relative numbers of Q0, Q1, Q2, Q3, and Q4 silicate structural units. Even though the iron concentration is constant, the linkages of silicate structural units show variation with increasing alkali content. The roles of lithium and iron have been found to be opposed to each other in that the presence of lithium discourages formation of tetrahedral linkages in the structure, whereas iron promotes corner connected tetrahedra or the presence of bridging oxygens.

Micro-structural study of Yaozhou celadons (Tang to Yuan Dynasty): probing crystalline and glassy phases

“…Baseline subtraction and minor smoothing were performed during the data analyses. The Raman spectra of glassy matrix were de-convoluted and analyzed by the technique of multiple curve fitting [22,24].…”

Nondestructive study of glassy matrix of celadons prepared in different firing temperatures

“…Raman spectroscopy, a nondestructive technique, is able to research the nature of vitreous glazes. [17][18][19][20][21][22][23][24][25][26][27] The glass network structure is composed of [SiO 4 ] 4À tetrahedral structure units containing different amounts of bridging oxygen. They are covalent and can exhibit remarkable Raman characteristics.…”

Optical Properties of SiO2 – TiO2 – La2O3 – Na2O – Y2O3 Glasses and A Novel Process of Preparing the Parent Glass-Ceramics

“…The introduction of Y2O3 into the glass network enhanced the optical and physical properties of the glass [11]. Glasses containing rare-earth ions have several optical and photonic applications available [12][13][14][15][16][17][18][19]. It is highly possible for UV optics and solid-state batteries applications because of the good ionic conductivity of these glasses [12][13][14][15][16][17][18][19].…”