One. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure one.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mainly made up of borosilicate glass, a cloth renowned for its lower thermal expansion coefficient and chemical inertness. The chemical makeup ordinarily involves silica (SiO₂, fifty-90%), alumina (Al₂... https://socialcreditu.com/post/9646_elementary-substance-is-a-pure-chemical-substance-that-consists-of-atoms-belongi.html