1. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure one.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mainly made up of borosilicate glass, a material renowned for its very low thermal expansion coefficient and chemical inertness. The chemical make-up typically features silica (SiO₂, 50-90%), alumina (Al... https://www.bib.az/post/229342_sulfide-powder-refers-to-the-chemical-compounds-powder-with-large-families-of-in.html