1. Scientific Foundations Of Hollow Glass Microspheres one.1 Composition and Microstructure one.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are largely composed of borosilicate glass, a fabric renowned for its low thermal growth coefficient and chemical inertness. The chemical make-up commonly incorporates silica (SiO₂, 50-90%), alumina (Al₂O₃, ... https://www.pinlap.com/posts/35703