1. Scientific Foundations of Hollow Glass Microspheres 1.one Composition and Microstructure one.1.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mainly made up of borosilicate glass, a cloth renowned for its lower thermal enlargement coefficient and chemical inertness. The chemical makeup ordinarily involves silica (SiO₂, fifty-90%), alumina (Al₂O₃... https://www.geto.space/post/74063_metallic-boride-powders-are-very-unique-but-functional-new-ceramic-materials-the.html