Quartz Glass


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Quartz Glass: fused silica

Quartz Glass

 

a single-component lime silicate glass produced by melting natural varieties of silica, such as rock crystal, vein quartz, and quartz sand, as well as synthetic silicon dioxide.

A distinction is made between two types of industrial quartz glass: transparent (optical and industrial) and opaque. Opacity is produced by a large number of small light-scattering gas bubbles (diameter, 0.03–0.3 microns) distributed throughout the glass. Optical transparent quartz glass, which is produced by fusion of rock crystal, is completely uniform and does not contain visible gas bubbles. Among the silicate glasses it has the lowest index of refraction (nD = 1.4584) and the greatest light transmission, particularly for ultraviolet rays.

Quartz glass is characterized by high thermal and chemical stability; its softening temperature is 1400°C. It is a good dielectric: specific electrical conductivity at 20°C, 10-14 to 10-16 ohm-1.m-1; tangent of the dielectric phase angle at 20°C and 106 hertz, 0.0025–0.0006. Quartz glass is used for manufacturing laboratory vessels, crucibles, optical instruments, insulators (particularly for high temperatures), and articles resistant to temperature fluctuations.

P. D. SARKISOV

quartz glass, silica glass

Glass consisting entirely of pure, or nearly pure, amorphous silica;
References in periodicals archive ?
As one of the nations leading quartz glass blowers, TGP can also form affordable tubes in the diameters, wall thicknesses and lengths that best fit custom applications.
In this paper the diffusion welding of quartz glass has been studied in order to optimize process parameters and to evaluate the optical parameters of the formed joining zone.
Finishing quartz glass surfaces with laser radiation: Analysis of the parameters for process optimisation/automation, The 19th International DAAAM Symposium 2008, Intelligent Manufacturing and Automation
Rada RE--Composite resin restorations with Beta quartz glass ceramic Inserts.
It is the world's sole company able to make hollow cylinders from quartz glass in a single production step, Ventizz said.
Multi-lab, which is based in Newburn and also has a facility in Scotland, is one of the world's leading specialists in fabricated quartz glass and ceramic technology for industrial applications.
2]-laser beam is used as a polishing tool to finish quartz glass surfaces.
Made of shatterproof polymethyl methacrylate, which provides stability against UV radiation, they are an economical alternative to delicate quartz glass cuvettes.
Chlorosilanes are precursors for semiconductor silicone, synthetic quartz glass and pyrogenic silicas.
2618282 Laboratory funnels made of transparent quartz glass
The family-run Newcastle business, which employs around 60 people, has captured around 90% of the UK fabricated quartz glass market.