The East China Sea fused quartz manufacturer Tokai fused silica manufacturers will select high-quality silica material [sio2> 99%] in the electric arc furnace or resistance furnace melting, the melting temperature of 1695-1720 ℃. Due to high the sio2 melt viscosity, the East China Sea molten quartz manufacturer in the 1900 ° C for 10 7 power Pa · s, can not use the casting method of molding. After cooling, vitreous fused silica manufacturers of the East China Sea can be used as firing products or do not burn products, raw materials.