One. Scientific Foundations of Hollow Glass Microspheres 1.one Composition and Microstructure one.1.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are generally composed of borosilicate glass, a cloth renowned for its reduced thermal enlargement coefficient and chemical inertness. The chemical makeup ordinarily features silica (SiO₂, 50-90%), alumina... https://sites.google.com/view/boridepowder/%E9%A6%96%E9%A1%B5?read_current=1