1. Scientific Foundations Of Hollow Glass Microspheres one.1 Composition and Microstructure 1.one.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mainly made up of borosilicate glass, a material renowned for its lower thermal expansion coefficient and chemical inertness. The chemical makeup ordinarily incorporates silica (SiO₂, 50-90%), alumina (A... https://community.wongcw.com/posts/1164875