1. 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 material renowned for its very low thermal expansion coefficient and chemical inertness. The chemical makeup normally consists of silica (SiO₂, fifty-ninety%), alu... https://youslade.com/post/348649_elementary-substance-is-a-pure-chemical-substance-that-consists-of-atoms-belongi.html