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 ...
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]
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.
For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail. 24/7 Help. ... Amazon, Walmart and more. See all deals. In Other News. Entertainment. Entertainment. The Today Show.
For premium support please call: 800-290-4726 ... West Midlands Police said the van was spotted by officers on Saturday morning using cloned plates near Castle Vale. ... Amazon, Walmart and more ...
(Reuters) -A state funeral for Jimmy Carter, the former U.S. president who died on Sunday at the age of 100, will be held at the Washington National Cathedral on Jan. 9, according to the U.S. Army ...
United States powder manufacturers resumed powder sales of one-pound (454 gram) canisters after observing Hodgdon's successful sales to handloaders. DuPont resumed retail distribution of their pre-war nitrocellulose Improved Military Rifle (IMR) series; and Hercules Powder Company resumed production of six of their pre-war double-base powders.
For premium support please call: 800-290-4726 more ways to reach us. Sign in. Mail. 24/7 Help. ... Amazon, Walmart and more. See all deals. In Other News. Entertainment. Entertainment. People.