Spectral study of ferrous iron in CaAlborosilicate glass at room and melt temperatures

Abstract

Ferrous iron absorption in the near-infrared region has been examined in CaAlborosilicate glass at room and melt temperatures. Based upon mineral spectra, ferrous iron is concluded to occupy a variety of modifier positions of different sizes in the glass structure. A new emission technique is used to collect spectral data of molten glass. Absorption at room temperature and 1260 °C is similar and no difference could be detected at different melt temperatures, once oxidation effects are eliminated. Oxidation and dehydroxylation occur simultaneously at melt temperatures, but these processes are probably not mutually dependent.