1. Scientific Foundations of Hollow Glass Microspheres 1.one Composition and Microstructure 1.1.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mostly composed of borosilicate glass, a material renowned for its low thermal enlargement coefficient and chemical inertness. The chemical makeup generally features silica (SiO₂, 50-ninety%), alumina (Al₂... https://500px.com/photo/1117584681/elementary-by-okok-okok