Fused quartz wholesale sales / fused quartz wholesale fused silica wholesale sales / molten quartz wholesale selection of high-quality silica material [sio2> 99%] in the electric arc furnace or resistance furnace melting, the melting temperature of 1695-1720 ℃. The high the sio2 melt viscosity, fused silica supplier in the 1900 ° C for 7-th power of 10 Pa · s, can not be cast molding methods. After cooling, vitreous fused silica supplier can be used as firing products or do not burn products, raw materials. Fused quartz Chemical Composition SiO2 99.9-99.95% of Fe2O3 10PPM-25PPM the max of Li2O 1-2PPM max Al2O3 20-30PPM the max of K2O 20-25PPM max of Na2O 10-20PPM max fused silica physical properties of a colorless transparent block, granules or white powder . True specific gravity: 2.21; Mohs hardness: 7.0; PH value: 6.0