One. 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 fabric renowned for its low thermal growth coefficient and chemical inertness. The chemical make-up generally contains silica (SiO₂, fifty-ninety%), alumina (Al₂... https://www.scoop.it/topic/okok0972/p/4168402012/2025/10/14/how-is-calcium-stearate-powder-s-molecular-framework-engineered