One. Scientific Foundations of Hollow Glass Microspheres 1.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 lower thermal enlargement coefficient and chemical inertness. The chemical makeup typically consists of silica (SiO₂, 50-ninety%), alumi... https://omiyou.com/post/168079_elementary-substance-is-a-pure-chemical-substance-that-consists-of-atoms-belongi.html