Quartz glass is a special glass that contains only a single component of silica. Due to the different types, industries, raw materials, foreign often called silicate glass, quartz glass, fused glass, fused quartz, synthetic fused quartz, as well as no clear concept of transparent, translucent, opaque quartz, etc.. China collectively called quartz glass, more by the process method, use and appearance to classify, such as electrofusion transparent quartz glass, even fused quartz glass, gas refining transparent quartz glass, synthetic quartz glass, opaque quartz glass, optical quartz glass, quartz glass for semiconductors, quartz glass for electric light sources. People are accustomed to use such a simple word as "quartz" to name this type of material, which is absolutely inappropriate, because "quartz" is a common name for the crystalline state of silicon dioxide, it is different from the glass state of silicon dioxide in physical and chemical properties.

  Quartz glass has a very low coefficient of thermal expansion, high temperature resistance, excellent chemical stability, excellent electrical insulation, low and stable ultrasonic delay performance, the best performance of ultraviolet spectral transmission and visible and near-infrared spectral transmission, and has higher than ordinary glass mechanical properties. Therefore, it is one of the excellent materials indispensable in the modern cutting-edge technology of space technology, atomic energy industry, national defense equipment, automation system, as well as semiconductor, metallurgy, chemical industry, electric light source, communication, light industry, building materials and other industries.

  Quartz glass is made of natural crystalline quartz (crystal or pure silica), or synthetic silane by high temperature fusion. The fused product has excellent processing properties, and within its high viscosity range, the tube and rod can be thermally processed like ordinary glass fine work, and can also be machined at high speed with abrasives made of diamond or silicon carbide, so as to make a variety of complex shapes of instruments and special products.