Quartz glass is formed due to the high viscosity of its melt at high temperature. Quartz glass is widely used in semiconductors, semiconductor communication devices, optical instruments, laboratory instruments, lasers, electrical equipment, medical equipment and high temperature and corrosion resistant chemical instruments, chemical industry, electronics, metallurgy, building materials and national defense. and other industries. With the advancement and development of semiconductor technology, quartz glass is also widely used in various semiconductor production processes. For example, the Czochralski method converts polycrystalline into monocrystalline silicon; cleaning tanks for cleaning; diffusion tubes for diffusion; bell jars for ion implantation, etc.
Quartz glass is a special glass that contains only silica. Due to the different types, processes and raw materials, it is often called quartz glass, fused quartz, fused quartz, synthetic fused quartz, silicate glass, and transparent, translucent and opaque quartz without a clear concept. In my country, it is collectively referred to as quartz glass, which is mostly classified according to process methods, uses and appearance, such as: fused transparent quartz glass, continuous fused quartz glass, gas-smelted transparent quartz glass, synthetic quartz glass, opaque quartz glass, optical quartz glass, semiconductor use Quartz glass, quartz glass for electric light sources, etc. People are accustomed to using a simple word such as “quartz” to name this material, which is inappropriate, because “quartz” is a general term for the crystalline state of silica, which is similar to vitreous silica in physicochemical properties. There is a difference.
Quartz glass has a very low coefficient of thermal expansion, high temperature resistance, good chemical stability, excellent electrical insulation, low and stable ultrasonic delay performance, good UV spectral performance and visible light and near-infrared spectral performance. And has higher mechanical properties than ordinary glass. Therefore, it is one of the indispensable excellent materials in modern space technology, atomic energy industry, national defense equipment, automation system, and semiconductor, metallurgy, chemical industry, electric light source, communication, light industry, building materials and other industries.
