One. Scientific Foundations of Hollow Glass Microspheres one.one Composition and Microstructure 1.1.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 generally contains silica (SiO₂, fifty-ninety%), a... https://hackmd.io/@okok0972/rk1IrEjagl