One. Scientific Foundations of Hollow Glass Microspheres one.1 Composition and Microstructure one.one.1 Chemical Composition: Borosilicate Dominance Hollow glass microspheres (HGMs) are primarily composed of borosilicate glass, a cloth renowned for its minimal thermal enlargement coefficient and chemical inertness. The chemical makeup commonly includes silica (SiO₂, fifty-ninety%), al... https://www.scoop.it/topic/okok0972/p/4168399964/2025/10/14/exactly-what-is-calcium-stearate-powder