The East China Sea fused silica supply the East China Sea fused silica supply of silica (quartz, silica) amorphous (glassy). It is typical of glass, the atomic structure of the long-range disorder. Cross-linked by the three-dimensional structure of its high temperature and low thermal expansion coefficient. Selection of high-quality silica material [sio2> 99%] in the electric arc furnace or resistance furnace melting, the melting temperature for 1695-1720. Molding the the sio2 melt viscosity is high, at 1900 ℃ for 7-th power of 10 Pa · s can not be cast method. Cooling is to the vitreous can be used as firing products or do not burn products, raw materials. East China Sea fused silica supply products mainly used for precision casting, glass, ceramics, refractories and electronic industries. The purity of the East China Sea fused silica supply: the silica content of special a not less than 99.99%, a not less than 99.96%, two of not less than 99.95%, three shall be not less than 99.7%, four shall not be less than 99.6%.