Search results
Results from the WOW.Com Content Network
For white LEDs, a blue LED is used with a yellow phosphor, or with a green and yellow SiAlON phosphor and a red CaAlSiN 3-based (CASN) phosphor. [ 23 ] [ 24 ] [ 25 ] White LEDs can also be made by coating near-ultraviolet-emitting LEDs with a mixture of high-efficiency europium-based red- and blue-emitting phosphors plus green-emitting copper ...
In practice, the silicon is typically placed near or inside a nuclear reactor (most commonly a research reactor e.g. the one at MIT [104]) to receive the neutrons. As neutrons continue to pass through the silicon, more and more phosphorus atoms are produced by transmutation, and therefore the doping becomes more and more strongly n-type.
Polycrystalline Mn:SrAl 12 O 19 is used as a green phosphor for plasma displays, and when doped with praseodymium or neodymium it can act as a good active laser medium. Sr 0.95 Ce 0.05 Mg 0.05 Al 11.95 O 19 is a phosphor emitting at 305 nm, with quantum efficiency of 70%. Several strontium aluminates can be prepared by the sol-gel process. [6]
The AOL Help site is your starting point for getting support from AOL. Support may come via phone, chat, social media or help articles, depending on the question or issue you have.
The C was to indicate the powder burned "cooler" than traditional Improved Military Rifle (IMR) powders. [4] In 1949, he began acquisition of powder salvaged from disassembled Oerlikon 20mm cannon cartridges. This powder resembled IMR 4350 in appearance, and with a slower burning rate, was initially marketed as "4350 Data", and later as 4831. [5]
AOL Mail welcomes Verizon customers to our safe and delightful email experience!
Where to shop today's best deals: Kate Spade, Amazon, Walmart and more. AOL. The best under-$50 clothing items to buy at Amazon right now. See all deals. In Other News. Entertainment.
Phosphor thermometry is an optical method for surface temperature measurement. The method exploits luminescence emitted by phosphor material. Phosphors are fine white or pastel-colored inorganic powders which may be stimulated by any of a variety of means to luminesce, i.e. emit light.