Tungsten carbide-based cemented carbide is widely used in cemented carbide, and high-quality tungsten carbide powder is the basis for preparing high-performance cemented carbide. What is the preparation method of high crystallinity tungsten carbide powder?

Compared with the negative electrode made of tungsten disulfide alone, the tungsten disulfide carbon nanotube negative electrode material has better rate performance and cycle stability, and is more suitable for participating in the production of sodium ion batteries. What is the preparation method of tungsten disulfide carbon nanotube anode material?

In order to overcome the shortcomings of the existing technology, chemical researchers designed a method for preparing nano-tungsten disulfide with a fullerene structure. 

The conventinal autoclave soda leaching is a mature method for treating tungsten concentrate, where tungsten concentrate reacts with sodium carbonate to produce sodium tungstate. And finally through ion exchange and evaporative crystallization, ammonium paratungstate (APT) was manufactured. However the mass waste water is produced during the process.

To ensure the electromagnetic characteristics and processing quality and efficiency of cutting magnetic components, the properties of nonmagnetic and good wear residence of Forming die and cutting tool are the major factors.

The applications of nanocrystalline tungsten oxide (WO₃) include electrochromic, photochromic, gasochromic and sonochromic devices, as a photocatalyst for water splitting and purification, for photoelectrochemical decomposition of water, in heterogeneous catalysts. With the excellent gas sensitivity, another important application is gas sensors.

As an important solid lubricating material, tungsten disulfide has a wide range of applications in aerospace, machining, new energy vehicles, medical, electronics, digital and other fields due to its excellent tribological properties. However, the carrying capacity of pure WS2 film is low, and it is easy to absorb moisture and oxidize in humid air, which seriously shortens its service life.

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Among MoS2, WS2, MoSe2, and WSe2, the intrinsic state of WS2 is a bipolar semiconductor with both n-type and p-type electron transport characteristics. Therefore, graphene-like WS2 films have become the current research in the field of two-dimensional atomic layer materials. The following mainly introduces the research status of photoelectric and electrocatalytic performance of WS2 film.

Through the introduction of the preparation methods (Ⅰ) and (Ⅱ) of tungsten trioxide graphene composite materials, we can know clearly that they all have the disadvantages of complex production process, long reaction time, difficult solid-liquid separation, and low yield.