Phenolic Resin manufacturer / supplier in China, offering Hollow Glass Microspheres with Low Density of 0.15-0.6g/Cm ³ and High Strength of 5000-18000psi Are Used as Insulation and Lightweight Fillers for Composit, High Purity Molten Mullite (Al6Si2O13) with a Content of 92% -99% Al2O3 Is Used as a Refractory Material for Casting, Steelmaking, and Ceramic Kilns, High Purity Calcined Alumina Powder Hot Pressed Refractory Material Diaphragm Ceramic Substrate Ceramic Thermal Conductivity Grinding and Polishing and so on.