Abstract: Glass is a material that has theoretically an unlimited number of chemical compositions, it is used in various domains (optics, energy saving, heat radiant ...). The aim of our research is finding chemical compositions for elaborating high-reflective glasses in the Visible-Infrared range.

In this work, the preparation structural and optical characterizations of SiO₂ (~60%) mixed with WO₃ and others additives, will be studied.

Samples were prepared by using alumina crucible via the classical melting technique, and then heated approximately at 1450 C for 2h and poured on metal plate to obtain pieces of silica-based glasses containing different amounts of WO₃, afterwards, the samples were powdered and mixed with water, kaolin, CMC and TPF, then deposited over a ceramic plate by using a strip in order to create a thin film, about 50-100 m of thickness then fired according a selected heating cycles to obtain homogeneous layer. The characterizations that will be presented in this study are the following:

" X-Ray Diffraction analysis of sample powders (powder size < 50 m) were carried out with (XRD) instrument (Bruker, D8 Advance) with Cu K_α1 (1.540598 , 40 kV power.

" Scanning Electron Microscopy analysis of surfaces shards were achieved by using a SEM microscope Zeiss mod DSM 950 operating at 20 kV and backscattered electrons. Specimens were treated with Hydrofluoric acid (HF) for 10 s and washed with distilled water.

" VIS-NIR Reflectance was measured using a Perkin Elmer, lambda 950 spectrophotometer equipped with a 150-mm integrating sphere (wavelength from: 350 to 2500 nm).