What are the properties of quartz glass?
Quartz glass features
- good transmission behavior in ultra-violet, visible and infrared wavelengths.
- high temperature endurance.
- a low coefficient of thermal expansion.
- good thermal shock resistance.
- excellent electrical insulation.
- high chemical purity.
Is quartz glass transparent?
Quartz crystals have piezoelectric properties: they develop an electric potential with the application of mechanical stress. Today, a crystal oscillator is a common piezoelectric use for quartz. Pure quartz is colorless and transparent or translucent.
What is optical grade quartz?
Optical Quartz Glass is Synthetic Fused Silica Quartz glass for optics bases on high-purity synthetic quartz called fused silica, produced by a flame hydrolysis process. Only such unique quartz glass qualities offer this high transmission for deep UV-light, which is greater than 80% at a wavelength as low as 185 nm.
Is fused quartz transparent to UV light?
Fused Quartz is normally transparent. features high transparency within ultraviolet and visible regions. It has no absorption bands within 170-250nm wavelength interval. It has an intensive OH-absorption band at 2600-2800nm wavelength range.
Why quartz is used in glass?
Conclusion. Quartz glass is valued for its superior optical properties (i.e. light transmittance), low coefficient of thermal expansion, and good chemical resistance. The starting material for quartz glass production is natural quartz, cultured quartz or a synthetic precursor such as silicon tetrachloride.
What is the difference between quartz and quartz glass?
As an amorphous substance, glass has a random molecular structure, while quartz has a symmetrical molecular structure. Quartz can be subject to greater temperature and pressure as compared to glass. Both quartz and glass are utilized for electrical purposes; glass is an insulator, while quartz is a conductor.
Why are crystals transparent?
“Simply stated, a solid material will appear transparent if there are no processes that compete with transmission, either by absorbing the light or by scattering it in other directions. Pure metals reflect light but do not transmit it, because they are filled with free electrons.
Why does quartz transmit UV light?
Quartz will transmit UV from 180 nm to 400 nm. Since quartz is made of silicon dioxide, glasses made from a high proportion of this material will also readily transmit UV. One such glass is known as VYCOR, which is 96% silica. However, remember that the shortest UV is the most damaging to the skin and cells.
What is quartz glass used for?
Quartz glass is used in the manufacturing of optical devices, lighting systems, refractory materials, and chemical apparatuses.
Why does quartz not absorb UV light?
Ultraviolet light has shorter wavelength than visible light, although ultraviolet waves are invisible to human eyes. If we use glass in place of quartz then glass will absorb ultraviolet rays while quartz does not. Ultraviolet radiant has a low power of penetration, hence it directly affects the human body as well.
Can you use quartz as glass?
The starting material for quartz glass production is natural quartz, cultured quartz or a synthetic precursor such as silicon tetrachloride. Electric fusion produces Type I glass. The quartz sand or crystals are fed into a refractory crucible and the melt is collected to be formed into various parts.