Structural , Electrical and Magnetic Properties of High Iron Content Sodium Borosilicate Glass

A series of high iron content sodium borosilicate glasses having composition 10 SiO2-40 B2O3-50 Na2O:x (CoO-Fe2O3);0≤x≤50 wt% were prepared by conventional melt quench method. Density of these glasses was found to increase in the range of 2.47-3.03 g/cm 3 , along with increasing glass molar volume. FTIR showed the gradual conversion of BO3 units to BO4 units along with enhanced B-O-Si linkage with the increasing of (CoO-Fe2O3) content. AC electrical conductivity and dielectric properties were investigated at room temperature within frequency range 100 Hz to 100 KHz. Dielectric parameters such as dielectric constants ε′ and ε'' with the ac. conductivity σac were found to increase with increasing of (CoO-Fe2O3) content. The increase in ac conductivity with iron content is likely to arise due to structural changes of the glass network. Magnetic hysteresis loops were traced at room temperature using VSM and values of saturation magnetization MS and coercive field HC were determined. The obtained results revealed that a ferrimagnetic behavior was observed and as (CoO-Fe2O3) concentration increases the values of MS increase whereas that of HC dramatically decreased from 271.12 to 179.23Oe.