1. Scientific Foundations Of Hollow Glass Microspheres one.1 Composition and Microstructure one.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are generally composed of borosilicate glass, a cloth renowned for its minimal thermal enlargement coefficient and chemical inertness. The chemical makeup generally contains silica (SiO₂, fifty-ninety%), alu... https://www.friend007.com/post/560891_metallic-boride-powders-are-very-unique-but-functional-new-ceramic-materials-the.html