Tungsten oxide ultrathin nanosheets were successfully stripped by liquid phase stripping method and used for the study of electrochromic properties. The nanosheet thickness of only 1.4 nm, size of 500 nm. Access to different voltages, tungsten oxide thin nanosheets in the colorless and dark blue reversible conversion between the color. The research focuses on the electrochromic properties of tungsten oxide ultrathin nanosheets and bulk tungsten oxide.

Sub-stoichiometric tungsten oxide (WO_3-x) is a tungsten oxide structure containing many oxygen defects in the crystal lattice. Partial depletion of oxygen in tungsten oxide affects its electron band structure and increases its conductivity. Tungsten oxide reduction reaction is usually accompanied by structural changes.

Research on hydrated tungsten oxide dates to the 1940s. Up to now, there are four types of hydrated tungsten oxides that are commonly found in the world at present depending on the type of water they contain: WO₃ · 2H₂O, WO₃ · H₂O, WO₃ · 0.5H₂O and WO₃ · 0.33H₂O. Due to the different crystalline water, there is a clear difference between the crystalline structures of the different hydrous tungsten oxides. Tungsten dioxide dihydrate has a layered structure which, in common with monoclinic tungsten oxide, has the structural unit consisting of tungsten oxide octahedra.

In the field of hard alloy, coarse grain cemented carbide has less structural defects, high hardness, low micro strain and a series of advantages, so it is widely used in rock drilling tools, drilling tools, stamping die, wear resistance and corrosion resistance, high temperature and high pressure parts, metal pressure processing tools, steel rolling, hard roll ring the field of materials etc..

Adding a certain amount of rare earth elements into tungsten can change the performance of tungsten wire, such as adding cerium or thorium into tungsten can improve the electron emission and ablative ability, and improve the processability of tungsten at the same time. The tungsten alloy wires and products produced by these properties are mainly used in electronic tube hot wire, argon arc welding electrode, pulse tube heating wire and so on.

Tungsten atomic number of 74, a density of 19.35g / cm3, has good radiation shielding properties, and does not produce secondary electron radiation, is used to make nuclear radiation shielding material ideal. But it is worth noting that tungsten is a refractory metal with high melting point and poor toughness and toughness. It is difficult to form and process and has high cost, so it is difficult to prepare applied parts with more complex shape. Therefore, it is subject to many limitations when applied.