Tungsten alloy radiation shielding sheet is a lead-free shielding sheet that has excellent radiation shielding performance to X-rays and γ-rays, so it is mainly applied for CT room. Although walls of CT rooms have built with 37 solid bricks and the walls are coated with barium sulfate protective material (the ground and ceiling are also coated), the ceiling still needs to be protected by a lead plate of thickness of 3mm. Wherein, the lead equivalent depends on the parameters of CT device.

Tungsten alloy sheet applied for mobile CT scanner refers to a radiation shielding sheet placed behind the detector of the scanner for absorbing X-rays (not absorbed by the detector). Nowadays, the design of medical equipment is developing in the direction of miniaturization and convenience while taking the performance into account, and the same is true of CT equipment. In order to "offload" the mobile CT device, it is very important to choose a proper shielding material. Compared with traditional lead sheet, tungsten alloy sheet has higher density and stronger radiation protection performance, so it is more suitable as a radiation shielding sheet.

Tungsten alloy tube can be used as a radiation shield in a mobile CT scanner. The tube is a sleeve made of tungsten alloy plate, with thickness of 1-5 mm. The tungsten alloy shielding tube has a slit with the same width as the detector for X-ray photon emission to realize CT imaging.

Fine tungsten disulfide is a tungsten chemical product. Tungsten disulfide (WS2) is mainly used as a lubricant or as a petroleum catalyst. There are many preparation methods for fine particle size tungsten disulfide, including the ammonium tetrathiotungstate method, sulfur method, and the preparation method using WO3 and W powder as raw materials and introducing hydrogen sulfide gas or sulfur vapor. At present, the most commonly used method in industry is ammonium tetrathiotungstate method.

WS2 dry lubricant, also known as WS2 dry film lubricant, is the best way to solve surface abrasion. It has been widely used in the automotive industry, machinery industry, medical equipment and other industries. As early as the 1980s, the United States has used WS2 colloidal products (equivalent to WS2 nanoparticles) to spray on the metal surface to form a dry film that can greatly reduce the friction coefficient and improve the life of the mold.

WS2 solid lubricant is a kind of sulfide solid lubricant, and is also one of the currently preferred solid lubricants, which has the advantages of low friction coefficient, strong adhesion, and good film-forming properties. In recent years, the ultra-low friction and ultra-low wear shown by hollow inorganic fullerene-like nano WS2 have attracted much attention.

Nano tungsten disulfide, or nano WS2, is a very important additive in the production of high-performance lubricating oil. According to the experts, under the same conditions, the lubricating performance of the base oil added with WS2 nanoparticles is significantly better than the base oil added with conventional WS2 particles, and it has good dispersion stability. In addition, the lubrication performance of nano WS2 is superior to that of nano MoS2.

How to prepare tungsten disulfide nanosheet? It is reported that tungsten disulfide (WS2) nanosheet powder can be prepared by mechanical peeling.

Tungsten disulfide nanosheet, or WS2 nanosheet, has good catalytic performance and visible light response performance, and also has good chemical stability, high corrosion resistance and excellent anti-toxicity, so that it is applied for fabricating catalytic anode of a low-temperature fuel cell.

Tungsten disulfide nanosheet, or WS2 nanosheet, is applied for producing catalytic anode of a fuel cell. The researchers proposed a visible light-responsive catalytic anode for a low-temperature fuel cell, consisting of a conductive substrate and a catalyst layer supported on the conductive substrate. Wherein, the conductive substrate is made of copper, conductive glass or carbon material, and the catalyst layer is composed of WS2 nanosheet powder and a gold nanocatalyst supported on the WS2 nanosheet powder.