Abstract
Glasses pertaining to Zinc Strontium Borate system with two series i.e., Series A: xZnO-ySrO-60B2O3 (x=10, 30 and y=30, 10) and Series B: xZnO-ySrO-45B2O3 (x= 45,10 and y=10,45) were synthesized by conventional melt quench technique. The study comprehends the effect of modifiers viz., zinc and strontium in both the series. The density of glass were found to increase with increase in concentration of strontium in series A which indicates the creation of more bridging oxides thereby leading to formation of BO4 tetrahedra on contrary in series B, the density of glass was found to decrease with increase in strontium concentration. Structural properties of these glasses were analyzed through Infrared Spectroscopy and the spectra confirm the existence of various borate segments. The inter conversion of BO3 to BO4 and vice-versa by varying modifiers have been examined by FTIR spectroscopy. Direct and indirect band gap values were found to be ranging from 2.81 to 3.07eV. In series A, the optical band gap was found to be higher for glass containing higher concentration strontium and for series B, the optical band gap was found to be lower for glasses containing higher concentration of strontium.
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