One. Scientific Foundations of Hollow Glass Microspheres 1.one Composition and Microstructure one.one.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are principally composed of borosilicate glass, a material renowned for its low thermal growth coefficient and chemical inertness. The chemical make-up usually includes silica (SiO₂, 50-ninety%), alumina... https://pastelink.net/7to4yheu