1. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure 1.one.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are generally composed of borosilicate glass, a cloth renowned for its reduced thermal enlargement coefficient and chemical inertness. The chemical makeup commonly contains silica (SiO₂, fifty-ninety%), alum... https://www.bib.az/post/229332_elementary-substance-is-a-pure-chemical-substance-that-consists-of-atoms-belongi.html