1. Scientific Foundations Of Hollow Glass Microspheres one.1 Composition and Microstructure 1.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 commonly contains silica (SiO₂, fifty-ninety%), alumin... https://www.geto.space/post/74063_metallic-boride-powders-are-very-unique-but-functional-new-ceramic-materials-the.html