quartz glass - definição. O que é quartz glass. Significado, conceito
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O que (quem) é quartz glass - definição

GLASS CONSISTING OF PURE SILICA
Fused silica; Quartz glass; Silica glass; Fused-quartz; Sio2 glass; Molten silica; Quartz glas; Suprasil; Infrasil; Vitreous silica
  • An [[EPROM]] with fused quartz window in the top of the package
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  • Phosphorescence in fused quartz from an extremely intense pulse of UV light in a flashtube, centered at 170 nm

Fused quartz         
Fused quartz, fused silica or quartz glass is a glass consisting of almost pure silica (silicon dioxide, SiO2) in amorphous (non-crystalline) form. This differs from all other commercial glasses in which other ingredients are added which change the glasses' optical and physical properties, such as lowering the melt temperature.
Quartz fiber         
  • A [[quartz fiber dosimeter]], a device using a quartz fiber.
GLASS FIBER MADE WITH PURE SILICA (FUSED QUARTZ)
Quartz-fiber; Quartz-fibre; Quartz fibre
Quartz fiber is a fiber created from high purity natural quartz crystals. It is made by first softening quartz rods (in an oxyhydrogen flame) and then creating filaments from the rods.
Quartz crisis         
  • The first Swiss quartz clock, which was made after World War II (left), on display at the [[International Museum of Horology]] in [[La Chaux-de-Fonds]]
  • Seiko Grand Quartz, produced in 1978
  • Swatch ''Once Again'' watch
ECONOMIC UPHEAVALS CAUSED BY THE ADVENT OF QUARTZ WATCHES IN THE 1970S AND EARLY 1980S
Quartz revolution
The quartz crisis was the upheaval in the watchmaking industry caused by the advent of quartz watches in the 1970s and early 1980s, that largely replaced mechanical watches around the world.Smithsonian: The quartz revolution revitalized the U.

Wikipédia

Fused quartz

Fused quartz, fused silica or quartz glass is a glass consisting of almost pure silica (silicon dioxide, SiO2) in amorphous (non-crystalline) form. This differs from all other commercial glasses in which other ingredients are added which change the glasses' optical and physical properties, such as lowering the melt temperature. Fused quartz, therefore, has high working and melting temperatures, making it less desirable for most common applications.

The terms fused quartz and fused silica are used interchangeably, but can refer to different manufacturing techniques, as noted below, resulting in different trace impurities. However fused quartz, being in the glassy state, has quite different physical properties compared to crystalline quartz. Due to its physical properties it finds specialty uses in semiconductor fabrication and laboratory equipment, for instance.

Compared to other common glasses, the optical transmission of pure silica extends well into the ultraviolet and infrared wavelengths, so is used to make lenses and other optics for these wavelengths. Depending on manufacturing processes, impurities will restrict the optical transmission, resulting in commercial grades of fused quartz optimized for use in the infrared, or (then more often referred to as fused silica) in the ultraviolet. The low coefficient of thermal expansion of fused quartz makes it a useful material for precision mirror substrates.