1. Scientific Foundations Of Hollow Glass Microspheres 1.one Composition and Microstructure 1.1.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are primarily made up of borosilicate glass, a fabric renowned for its very low thermal growth coefficient and chemical inertness. The chemical makeup typically contains silica (SiO₂, fifty-90%), alumina (Al₂O₃, https://www.scoop.it/topic/okok0972/p/4168402012/2025/10/14/how-is-calcium-stearate-powder-s-molecular-framework-engineered