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What is quartz glass

Release time:

2024-06-05 09:38

Quartz glass is made of various pure natural quartz (such as crystal, quartz sand, etc.). The linear expansion coefficient is very small, which is 1/10~1/20 of ordinary glass, and has good thermal shock resistance. Its heat resistance is very high, often use temperature is 1100 ℃ ~ 1200 ℃, short-term use temperature can reach 1400 ℃. Quartz glass is mainly used in laboratory equipment and special high-purity products refining equipment. Because of its high spectral transmission, it will not be damaged by radiation (other glass will be dark after being irradiated by radiation), so it is also an ideal glass for spacecraft, wind tunnel windows and spectrophotometer optical systems.

Quartz glass is a single component of silica amorphous material, its microstructure is a silica four-sided structural unit composed of a simple network, due to the Si-O chemical bond energy is very large, the structure is very close, so quartz glass has a unique performance, especially the optical properties of transparent quartz glass is very excellent, in the continuous wavelength range of ultraviolet to infrared radiation have excellent transmittance.

Quartz glass uses high-purity silica sand as raw material, and the traditional method of production is melting-quenching method (heating the material to the melting temperature, and then rapidly cooling to the solid phase of the glass); the production of ultra-high purity and ultraviolet transmittance of transparent glass requires silicon The process of vaporization, oxidation to silica and heating dissolution.

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 ultraviolet spectral performance and visible and near infrared spectral performance, and has higher mechanical properties than ordinary glass. Therefore, it is one of the indispensable excellent materials in modern cutting-edge technology, such as space technology, atomic energy industry, national defense equipment, automation system, semiconductor, metallurgy, chemical industry, electric light source, communication, light industry, building materials and so on.

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