One. Scientific Foundations of Hollow Glass Microspheres one.one Composition and Microstructure 1.one.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are principally composed of borosilicate glass, a fabric renowned for its reduced thermal enlargement coefficient and chemical inertness. The chemical makeup commonly involves silica (SiO₂, fifty-90%), a... https://talkitter.com/post/458077_metallic-boride-powders-are-very-unique-but-functional-new-ceramic-materials-the.html