Fused Silica

Some articles on fused, fused silica, silica:

Fused Quartz
... Fused quartz or fused silica is glass consisting of high-purity silica in amorphous (non-crystalline) form ... Fused silica, therefore, has much higher working and melting temperatures than soda-lime or borosilicate glasses ... Fused quartz is manufactured by fusing (melting) naturally occurring quartz crystals of high purity at approximately 2000 °C, using either an electrically heated furnace (electrically fused) or a gas/oxygen-fuelle ...
James Franklin Hyde - Life - Research
... In 1934, Hyde used a method called “frame hydrolysis” to create fused silica, an impurity-free glass ... Fused silica was initially used in mirrors, telescopes, radar, and later in spacecraft windows and fiber optics ... Corning researchers used this fused silica when they invented optical fiber in 1970, which provided faster transmission speeds than copper wires did ...
Fused Quartz - Applications
... Specially prepared fused silica is the key starting material used to make optical fiber for telecommunications ... strength and high melting point (compared to ordinary glass), fused silica is used as an envelope for halogen lamps, which must operate at a high envelope temperature to achieve ... EPROMs are recognizable by the transparent fused quartz window which sits on top of the package, through which the silicon chip is visible, and which permits exposure to UV light during erasing ...
Metal-halide Lamp - Components - Arc Tube
... Inside the fused quartz arc tube two tungsten electrodes doped with thorium, are sealed into each end and current is passed to them by molybdenum foil seals in the fused silica ... In the mid-1980s a new type of metal-halide lamp was developed, which, instead of a quartz (fused silica) arc tube as used in mercury vapor lamps and previous metal-halide lamp designs, use a sintered alumina arc ... This development reduces the effects of ion creep that plagues fused silica arc tubes ...
Fused Quartz - Physical Properties
... Fused quartz is prone to phosphorescence and "solarisation" (purplish discoloration) under intense UV illumination, as is often seen in flashtubes ... "UV grade" synthetic fused silica (sold under various tradenames including "HPFS", "Spectrosil" and "Suprasil") has a very low metallic impurity content making it transparent deeper into the ultraviolet ... Infrared grade" fused quartz (tradenames "Infrasil", "Vitreosil IR" and others) which is electrically fused, has a greater presence of metallic impurities, limiting its UV ...

Famous quotes containing the word fused:

    The Image is more than an idea. It is a vortex or cluster of fused ideas and is endowed with energy.
    Ezra Pound (1885–1972)