One. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure 1.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are generally made up of borosilicate glass, a fabric renowned for its reduced thermal expansion coefficient and chemical inertness. The chemical make-up commonly features silica (SiO₂, fifty-90%), alumina (... https://pastelink.net/9n6s6fxo