... ,better mobility,coefficient and good electromagnetic radiation. ApplicationSilica Quartz is widely used in aerospace,electronic epoxy encapsulation, ... refractoy materials,shelding and burnish polishing materials. Specification Quartz GradeSiO2Al2O3Fe2O3MgoCaORemarkNO.1990.50.050.10.1Used in special ... .51.51.5Used in colored glass Size: 4-6mesh, 6-10mesh, 10-20mesh, 40-70mesh, 100-200mesh, 270mesh, ...