COMPOSITION DEPENDENCE OF SPECTROSCOPIC PROPERTIES AND TRANSPARENCY OF SiO۲-TiO۲-Na۲O GLASS IN ۲۰۰-۱۱۰۰ nm

Abstract: Glassy samples with xTiO۲ .۳SiO۲ .Na۲O composition that (۸≤x≤۴۰) (molar) were casted in refractory steel molds after melting at air as parallel palates. After polishing and getting to desire thickness, UV-VIS spectrometry in ۲۰۰ -۱۱۰۰ nm was measured on samples. Glass density was measured by a sensitive micro balance and was found that by increasing titanium dioxide of glasses, glass density increases. Results from UV-VIS spectroscopy show that increase of titanium dioxide decreases light transmission and this value reaches zero for sample with ۴۰ molar percent of titanium dioxide. One reason of this reduction is formation of crystalline phase in glass, in which, by increasing titanium content crystalline phase will be increased, results of X-ray diffraction and electron microscopy confirm this claim.

Keywords:

glass , spectroscopy , titanium dioxide , optical transmission.