Structural and optical studies of Fe2O3 doped barium strontium titanate borosilicate glasses

Abstract

Perovskite (Ba,Sr)TiO₃ borosilicate glasses in the system 64[(Ba_1-xSr_x).TiO₃]-30[2SiO₂.B₂O₃]-5[K₂O]-1[Fe₂O₃] (0.4 ≤x≥1.0) were prepared by conventional melt-quench method. Synthesized glass samples were characterized by infrared and Raman spectroscopic techniques for their structural investigations while optical properties of these glasses have been studied by using UV-Vis NIR spectroscopy. These investigations confirm the absence of boroxol ring in glassy matrix. Optical band gap of barium strontium titanate borosilicate glasses lies in the range 2.48-2.87 eV and its density has been found to be in the range 2.70-3.12 g/cc.