What are the characteristics of quartz glass? Do you understand? Listen to the Beijing Cai quartz glass instrument factory Xiaobian to introduce you.

Quartz glass is a kind of special industrial technology glass of silica single component. The hardness of glass up to Morse seven, with high temperature and expansion coefficient low, thermal shock resistance, chemical stability and electrical insulation performance is good and through ultraviolet and infrared. In addition to hydrofluoric acid and hot phosphoric acid, has good acid resistance to acid. Divided into transparent and opaque by two categories of transparency. The purity is divided into three types, high purity, general and doped. With the crystal, silica, silicide as raw materials, by high temperature melting or chemical vapor deposited. Melting method, electro fusion method, gas refining method, etc..

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

Purity is an important indicator of quartz glass, the physical and chemical properties and performance of the impact is very large, such as loss of permeability, high temperature

Strength, softening point, light transmission, thermal stability, chemical stability, resistance to radiation, fluorescence characteristics etc.; in addition, for the quartz glass of the semiconductor industry, requirements on the purity of the more demanding, trace impurities will give electric performance and lifetime of semiconductor materials and integration brings serious influence. Since the purity of semiconductor materials is required to be controlled below ppb orders of magnitude, the quartz glass should be controlled in order to meet the needs of the semiconductor industry in PPm orders of magnitude. The segregation coefficient of B is close to 1, the most difficult to remove, is one of the most harmful impurities, Cu, Fe, Ti and other factors affecting the lifetime of semiconductor, K, Na, Li is a single crystal material to produce micro defects of harmful impurities.

 

Reproduced please specify：Laser Optex Inc. » Do you understand the characteristics of quartz glass?