1. Scientific Foundations of Hollow Glass Microspheres 1.1 Composition and Microstructure one.1.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are primarily made up of borosilicate glass, a cloth renowned for its lower thermal enlargement coefficient and chemical inertness. The chemical makeup ordinarily incorporates silica (SiO₂, fifty-90%), alumina (... https://www.jointcorners.com/post/483681_elementary-substance-is-a-pure-chemical-substance-that-consists-of-atoms-belongi.html