Effects of SnO2 on spectroscopic properties of borosilicate glasses before and after plasma treatment and its mechanical properties

Abstract

B2O3–SiO2–Na2O–Al2O3–TiO2 glasses modified by SnO2 have prepared and characterized by UV–spectroscopy before and after plasma treatment and by ultrasonic techniques. Makishima–Mackenzie Model has been applied to determine the elastic moduli of glasses. The density and the elastic moduli either determined from the ultrasonic or that computed according to the Makishima–Mackenzie model increase as the SnO2 concentration increases. The values of the optical band gap Eg before and after plasma treatment, and refractive index have been determined. It was found that these parameters are sensitive to the increase of SnO2 content. The vibration temperature of nitrogen glow discharge has been calculated using Boltzmann plots of second positive system N2 (C3Πu) → (B3 Πg). The obtained results of vibration temperature decrease with increasing of gas pressure at different discharge currents.