A Study of the Effect of Lead Oxide on Structural and Elastic Properties of Recycled Silica Gel Glass by Ultrasonic and FTIR Technique

Abstract

 The purpose of this work is to study structural and elastic properties of recycled silica gel glass (RSG) by ultrasonic and FTIR techniques. The 10CaO – xPbO – (90–x) RSG glass systems (where  x = 20, 25, 30, 35, 40 and 45 mol%) were prepared by using melt-quenching method. Densities of the glass samples were measured using Archimedes’ principle with n-hexane as the immersion liquid. The longitudinal and shear ultrasonic velocities in the samples were measured at room temperature and at 4 MHz frequency using a pulse echo technique. The obtain results showed that changes in elastic properties of the glass samples depended on the concentration of PbO. Therefore the presence of PbO resuled in the destruction of the glass network and subsequent formation of non-briding oxygen (NBO). Moreover, these results can also be supported by FTIR technique.