One. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure one.1.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mostly composed of borosilicate glass, a cloth renowned for its small thermal growth coefficient and chemical inertness. The chemical makeup normally contains silica (SiO₂, fifty-90%), alumina (Al₂O₃, 10... https://pastelink.net/9n6s6fxo