Magnesium alloys high-purity

Eluorescent lamps used in photocopiers are configured so that part of the lamp acts as a reflector. The lamp is first coated with a high visibly reflecting material, such as finely divided titania used in paints or alumina. It is then coated with phosphor and a window is scraped off to allow the light to escape through the aperture giving the lamp a highly directional output. The phosphor emission is chosen to match the action spectmm of the photosensitive element on the copier dmm. Typically a blue-green emission around 490 nm is desired. A commonly used but expensive phosphor for this purpose is magnesium gallate activated with manganese.  [c.291]

Thixotropic injection mol ding offers a competitive technology for the magnesium die casting industry and has some unique advantages such as no molten metal handling or associated losses, rapid start-up and shutdown, improved die life, reduced porosity relative to die casting, and tighter part tolerances, and reduced scrap rates. The process, which is modeled after the plastics injection mol ding process, employs a granular alloy feed. The feed is heated under argon in the machine s screw injector to a temperature between the alloys soHdus andflquidus temperatures. Under the continuous mixing imparted by the screw, the material is converted to a thixotropic state at which point the material is injected into a mold of similar design to a standard high pressure die casting mold (111,112).  [c.331]

See pages that mention the term Magnesium alloys high-purity : [c.333]    [c.332]   
Corrosion, Volume 2 (2000) -- [ c.4 , c.105 ]