1. Scientific Foundations Of Hollow Glass Microspheres 1.one Composition and Microstructure one.1.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mostly made up of borosilicate glass, a fabric renowned for its low thermal growth coefficient and chemical inertness. The chemical make-up normally consists of silica (SiO₂, fifty-ninety%), alumina (Al₂O₃, https://www.pinlap.com/posts/35703