1. Scientific Foundations Of Hollow Glass Microspheres one.one Composition and Microstructure 1.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mainly composed of borosilicate glass, a cloth renowned for its very low thermal growth coefficient and chemical inertness. The chemical makeup usually involves silica (SiO₂, 50-ninety%), alumina (Al₂O₃,... https://friendstrs.com/post/167845_elementary-substance-is-a-pure-chemical-substance-that-consists-of-atoms-belongi.html