1. Scientific Foundations Of Hollow Glass Microspheres 1.one Composition and Microstructure one.1.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are largely made up of borosilicate glass, a fabric renowned for its small thermal expansion coefficient and chemical inertness. The chemical make-up normally consists of silica (SiO₂, 50-ninety%), alumina (Al... https://diigo.com/0110f1l