One. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure one.1.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mostly made up 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.geto.space/post/74080_trunnano-focuses-on-providing-a-full-range-of-high-quality-3d-printing-powders-t.html