Quartz tube is made of natural crystallized quartz (crystal or pure silica) or synthetic silane and melted at high temperature to form quartz glass. The molten product has excellent processing performance. In the extremely high viscosity range, the tube and rod can be heat-processed like ordinary glass fine work, and can also be processed at high speed with diamond or silicon carbide grinding tools. Quartz glass heaters can be made into various complex shapes of instruments and special products. The performance of quartz glass mainly depends on its purity, followed by the process or thermal system. The presence of trace impurities will have a significant impact on the performance of quartz glass; at the same time, due to the slight negligence of the process or thermal system, it will bring various defects to the appearance quality and produce a large number of waste products.