Tungsten Oxide

Yellow Tungsten Oxide  (YTO) is a kind of tungsten trioxide, because the early purification of WO 3  color is mostly yellow, so the early tungsten trioxide compounds are known as yellow tungsten oxide.  Yellow tungsten oxide two different sizes of different particles, showing different color. When the yellow tungsten oxide crystal size is about 1.5um, it appears to be yellow. When the yellow tungsten crystal size is about 15um, it appears to be green. Although the appearance of different, the characteristics are similar. Before 1970s, yellow tungsten oxide was widely used, and a large amount of tungsten oxide was used in the production of metal tungsten powder and tungsten carbide powder, and a large number of applications and production of tungsten alloy products, such as tungsten copper, tungsten nickel, tungsten nickel iron, tungsten silver, tungsten rhenium, thorium tungsten and so on. Another part is used in the manufac...

Tungsten trioxide film is a new type of functional material, which has a wide range of applications in smart windows, a large area flat-panel displays, gas sensor, and so on the field. But because WO3 Films still have some shortcomings, such as discoloration and sensitivity is not high, it will cause a lot of restrictions in the application. In order to improve its performance so that it can be widely used, the optimization can generally divided into three kinds: one is preparing a novel surface topography WO3 film. The second is the preparation of nanometer WO3 composite film, third film doped WO3 modified. With further research to expand, need to find new chemicals, new fetters, explore preparation skills and preparation parameters appropriate to improve the surface appearance of the film become a hot topic. Currently, for performance optimization WO3 film discoloration research focused on electrochromic and temperament discoloration. And to improve its photochromic,less heat t...