General introduction: Fused Silica, the amorphous state of SiO2, is fused in resistance furnace with high quality silica sand as raw materials. Fused silica could be smashed into lump, grit or white powder with characteristics of heat resistant and low heat expansion coefficient. Chemical Composition   SiO2 99.92-99.9% Fe2O3 15ppM max Li2O 1.0ppM max Al2O3 25ppM max K2O 20ppM max Na2O 11ppM max Applications: 1.Fused silica powder is very popular for precision casting 2. Fused silica powder could be used as refractory materials 3. Fused stone sand applied as raw materials for production of glass and ceramic 4. Fused stone is also a kind of electronic seal materials 5. As an ideal stuffing materials, fused silica could be used in paint and coating industry.