One. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure 1.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are generally made up of borosilicate glass, a fabric renowned for its lower thermal growth coefficient and chemical inertness. The chemical makeup ordinarily includes silica (SiO₂, 50-ninety%), alumina (Al₂... https://expressafrica.net/post/401191_elementary-substance-is-a-pure-chemical-substance-that-consists-of-atoms-belongi.html