One. Scientific Foundations of Hollow Glass Microspheres 1.one Composition and Microstructure 1.1.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are largely 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%), alumina (... https://www.malikmobile.com/story/194003-metallic-boride-powders-are-very-unique-but-functional-new-ceramic-materials-the.html