1. Scientific Foundations Of Hollow Glass Microspheres one.1 Composition and Microstructure 1.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are largely composed of borosilicate glass, a material renowned for its low thermal enlargement coefficient and chemical inertness. The chemical makeup normally involves silica (SiO₂, 50-ninety%), alumina (Al₂... https://community.wongcw.com/posts/1164874