Synthesis and Physical Characteristics of New Glasses from Some Environmental Wastes

Abstract

New glasses from harmful environmental waste like cement dust; limestone phosphate and sand were fabricated. The constructions of these sample investigation by FTIR, mechanical and optical properties. The density and refractive index of these glasses increases by increasing of SiO2 concentration. Longitudinal (vL), and share (vT) velocities increase with addition of silicon oxide. The elastic moduli values were showing increasing as an increasing of SiO2 concentration. The increase in elastic moduli may be connected to changing of the coordination number with an addition of SiO2 and the increase the bond strength, average force constant and the crosslink density. DTA of the investigated samples with exclusive SiO2 contents shows the increasing in Tg values. The molar volume and the optical band gab of these glasses decreases with increase of SiO2 expense on CaO.