Hollow Fly Ash Cenosphere for Casting/Construction/ Oil Well Cementing Product Description: Cenosphere, sometimes called microsphere, is a lightweight, 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 0.6-0.9 g/cm³, all these properties give it a wide application for insulation, refractory, oil drilling, coating, and construction use. Cenosphere Specification: SiO2 50-55% Al2O3 28-33% Fe2O3 2-4% SO2 0.1-0,2% CaO 0.2-0.4% MgO 0.8-1,2% Na2O 0.3-0.9% K2O 0.5-1.1% Product Applications: 1), Chemicals/Coating/Painting --- Provide measuring tool in biology and drug research, besides added to paints and epoxies to modify viscosity and buoyancy ; 2), Plastics --- Used to decrease material density (glass and polymer); 3), Ceramics --- Used to create porous ceramics used for filters; 4), Cosmetics --- Used to hide wrinkles and give color; 5), Electronic paper --- Dual Functional microspheres used in Gyricon electronic paper 6), Insulation --- expandable polymer microspheres are used for thermal insulation and sound dampening. 7), Retroreflective --- added on top of paint used on roads and signs to increase night visibility of the road stripes and signs;