1. Scientific Foundations Of Hollow Glass Microspheres one.one Composition and Microstructure 1.one.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are principally composed of borosilicate glass, a fabric renowned for its low thermal growth coefficient and chemical inertness. The chemical make-up generally consists of silica (SiO₂, fifty-ninety%), alu... http://www.mysportsgo.com/profile/okok0972/action_id/1516637/show_comments/1