... sphere under microscope. Excellent Auxiliar Hollow Glass Microspheres AppearanceHollow Glass Microspheres is a Free Flowing White Powder ... 60MPaThermal conductivity: 0.03-0.06w/m.kApplicationHollow Glass Microspheres' applications are in the fields of Thermal ... , fan blades, & caulking materials, emulsion explosives, golf, sealant, pipeline insulation materials, artificial marble, PVC foam, low density ...