Cenosphere Cenosphere China Cenosphere Supplier Product Details Cenosphere sometimes called microsphere, is a light weight, inert, hollow sphere made largely of silica and alumina and filled with air or inert gas, typically produced as a byproduct of coal combustion at thermal power plants. The color varies from gray to almost white and their density is about 0.60.9 g/cm³, all these property give it a widely application for insulation, refractory, oil drilling, coating, construction use - .
