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Structure and Properties of the Soda-Borate Glasses: Effect of Adding Fe₂O₃ Concentration

Djamila Aboutaleb and Brahim Safi

Effect of adding iron oxide (Fe₂O₃) in the sodium borate glasses (B₂O₃-Na₂O) in the structural and physical properties was studied. Samples of the studied glass system were prepared with different percent of Fe₂O₃ concentration. This latter was added by substitution of the B₂O₃ and Na₂O at concentration of (05, 10, 15 and 20 by wt %). The structural and physical properties of obtained glass were evaluated. The measurements of physical properties show that, in term of the glass density is relatively high with also high thermal expansion coefficient values with Fe₂O₃ presence. In the studied glass system, addition of transition iron oxide (Fe₂O₃) leads to weakened structure of glass so the transition temperature (Tg) and the softening temperature (Ts) decrease with increasing of Fe₂O₃ addition.