One. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure 1.one.1 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 commonly incorporates silica (SiO₂, fifty-90%), alumina (Al₂O₃,... https://gaming-walker.com/post/139858_metallic-boride-powders-are-very-unique-but-functional-new-ceramic-materials-the.html