1. Scientific Foundations Of Hollow Glass Microspheres 1.1 Composition and Microstructure one.one.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are largely made up of borosilicate glass, a fabric renowned for its reduced thermal enlargement coefficient and chemical inertness. The chemical makeup ordinarily includes silica (SiO₂, 50-90%), alumina (Al... https://www.jointcorners.com/post/483698_metallic-boride-powders-are-very-unique-but-functional-new-ceramic-materials-the.html