Abstract
The purpose of this study was to investigate the effect of the replacement of oxygen ions by chloride ions on the oxidation states of iron, and the magnetic and electrical properties of calcium borate glasses having the formula {60 mol% B2O3 - (30-x) mol% CaO, 10 mol% Fe2O3 x mol% CaCl2} where x = 0, 5, 10, 15 and 20. Mossbauer spectroscopy showed that the ratio of Fe3+/Fe2+ ions in the systems investigated depends on the extent of replacement of CaO by CaCl2 and the resulting effect on the structure depends on whether the oxide ion enters into the network of the glass as a network former or ex, network modifier. The magnetic investigations showed that the magnetic susceptibilities of the samples depend mainly on the Fe3+/Fe2+ ratio as function of CaCl2 content and the changes in glass sample matrices. The electrical conductivity values showed an increase with increasing CaCl2 content.