... uniform particle size distribution,better mobility,coefficient and good electromagnetic radiation. ApplicationSilica Quartz is ... encapsulation, precision casting,coating,painting,printing ink,tire and rubber,engineering plastic,sealant,adhesive,dental ... grade electronic,ceramica,special refractoy materials,shelding and burnish polishing materials. Specification Quartz GradeSiO2Al2O3Fe2O3MgoCaORemarkNO. ...