1. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure 1.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mainly composed of borosilicate glass, a fabric renowned for its minimal thermal enlargement coefficient and chemical inertness. The chemical make-up generally incorporates silica (SiO₂, fifty-ninety%), al... https://www.speakfreelee.com/post/78605_elementary-substance-is-a-pure-chemical-substance-that-consists-of-atoms-belongi.html