1. Scientific Foundations of Hollow Glass Microspheres one.one Composition and Microstructure 1.one.one Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are mainly made up of borosilicate glass, a material renowned for its lower thermal expansion coefficient and chemical inertness. The chemical makeup usually features silica (SiO₂, 50-ninety%), alumina (Al... https://www.pearltrees.com/okok5/item753855462