1. Scientific Foundations Of Hollow Glass Microspheres one.1 Composition and Microstructure 1.one.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are primarily made up of borosilicate glass, a material renowned for its lower thermal expansion coefficient and chemical inertness. The chemical makeup typically includes silica (SiO₂, 50-ninety%), alumina ... https://www.pinlap.com/posts/35703