Tungsten Oxide

Tungstate phosphor is a typical self activated luminescent material. Without the addition of other activated ions, they can produce high efficiency luminescence under the excitation of UV, X ray and CR. Tungstate matrix has the characteristics of stable luminescence spectrum, wide spectrum of luminescence spectrum and large area of visible light. The higher the purity, the greater the brightness of the luminescence, then, why does tungstate glow? The reason why tungstate will emit light, its roots from tungstate chromium ions, tungstate generally have wolframite structure and scheelite structure, among them, among them, tungstate crystal scheelite structure with a higher density, high-energy particles and high-energy radiation has a high ability to stop, is a good scintillator or X-ray emitter. At low temperature (liquid nitrogen or helium temperature) by ultraviolet short wavelength excitation, will emit green or blue light, it is the main material for the manufacture of...

Tungstate is the most classic one of the inorganic luminescent materials, as early as in 1896, scientists found that CaWO 4  can be applied to X-ray emission. In 1906 for the first time to be used as X phosphor materials, tungstate materials quickly penetrate into all aspects of human life. In 1948, people found that the brightness of tungstate with compound purity increases, tungstate can be launched by some elements, these rare earth elements doped tungstate lattice, can make it shine with special properties. In recent years, the energy-saving lighting industry has developed vigorously. However, the efficient lighting products are unable to avoid the mercury pollution problems while saving electricity and reducing energy consumption, with the developing of tungstate phosphors, LED has gradually become the market mainstream. Tungstate phosphors are those that can absorb energy (the absorbed energy including electromagnetic wave (including visible light, ultravi...

Tungstate is a typical self-activated luminescent material. Its luminescence spectrum is very stable, and its intrinsic luminescence spectrum is very wide and occupies most of the visible region. The cation in the tungstate strongly affects the position of the emission band. With the increase of atomic number of the cation, the peak shift of the emission band is blue, and the bandwidth is from 250 to 300 nm. It was not long before Roentgen discovered X-rays in 18 century, people use the penetrating power of the rays to check the internal condition of the human body or objects, and to observe or photograph the image directly by the enhancement of the ray emitting material. In 1896 found that CaWO 4  can be used as phosphor, in 1906, Puppin first used CaWO 4  as X-ray luminescent material. In 1916, Patterson made it a luminescent material for X-ray intensifying screen. In recent years, a great deal of research work has been done on the luminescence properties of ...