سال انتشار: ۱۳۸۸
محل انتشار: سومین کنگره بین المللی رنگ و پوشش
تعداد صفحات: ۸
B MirhadI – Department of Material Engineering, Imam Khomeini International University, Qazvin, Iran
B Mehdikhan – Department of Material Engineering, Imam Khomeini International University, Qazvin, Iran
M Markaz – Department of Inorganic Pigments and Glazes, Institute for Color Science and Technology
In this study, the effect of various oxidation states of iron on optical spectroscopy of sodium silicate glasses has been investigated. So as, different amount of iron oxide were added as xFe2O3.Na2O.2SiO2 compound to sodium disilicate glasses and were melted in different temperatures Iron commonly exists as an equilibrium mixture of ferrous ions, 2+ Fe , and ferric ions, 3+ Fe , in glass. 3+ Fe ions shows strong absorption in UV light and yellow color is appeared, while 2+ Fe has an absorption band in NIR, consequently has blue color. With increasing ferric iron, amount of 3+ Fe ions will increase and yellow color develops. With increasing melting temperature of glass, amount of 2+ Fe ions will increase and bluish-green color develops. As a result, some variation has been observed in optical spectroscopy UVVis of produced glasses.