One. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure one.1.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are principally composed of borosilicate glass, a cloth renowned for its minimal thermal enlargement coefficient and chemical inertness. The chemical makeup typically includes silica (SiO₂, 50-ninety%), alum... https://www.pinlap.com/posts/35703