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In these applications, the phosphor is directly added to the plastic used to mold the toys, or mixed with a binder for use as paints. ZnS:Cu phosphor is used in glow-in-the-dark cosmetic creams frequently used for Halloween make-ups. Generally, the persistence of the phosphor increases as the wavelength increases.
Potassium fluorosilicate is a chemical compound with the chemical formula K 2 [SiF 6].. When doped with potassium hexafluoromanganate(IV) (K 2 [MnF 6], with Mn 4+) it forms a narrow band red producing phosphor, (often abbreviated PSF or KSF), of economic interest due to its applicability in LED lighting and displays.
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 turn, other materials (such as nickel) can be used to quench the afterglow and shorten the decay part of the phosphor emission characteristics. The electronic configuration of the activator depends on its oxidation state and is crucial for the light emission. Oxidation of the activator is one of the common mechanisms of phosphor degradation.
(Gd0.99, Pr0.01)2O2S sub-microphosphors synthesized by homogeneous precipitation method are very promising for a new green emitting material to be applied to the high resolution digital X-ray imaging field [3] Gadolinium oxysulfide powder phosphors are intensively used for conversion of X-rays to visible light in medical X-ray imaging.
With the development of a wide trading network in Singapore, trade credit and finance became increasingly important to banks, merchants, manufacturers and traders. Boustead & Co, being one of the largest trading houses of the Far East, was the first agent for Hongkong and Shanghai Bank in Singapore, offering banking facilities, accepting and ...
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.
99.8% pure compressed deuterium gas, in lot size of 850 L (142 g). Also sold by same supplier in the form of heavy water at price of 3940 USD per kg deuterium. [12] In 2016, Iran sold 32 tons of heavy water to United States for 1336 USD per kg deuterium. [13] 2: He: Helium: 0.0001785: 0.008 (2.216 × 10 14 kg) 24.0: 0.004 29: 2018: USGS MCS [14]