Potassium phosphotungstate (K₃PW₁₂O₄₀) is a kind of Heteropoly acid. Potassium phosphotungstate, as a cathode active material in the molecular cluster of Heteropoly acid, has attracted much attention due to its reversible multi-electron redox reaction, which enables it to achieve a high specific capacity of 260 Ah/kg (ordinary Li₂CoO₂ lithium ion battery is 150 Ah/kg) and fast charge-discharge performance.

With the development of modern science and technology, higher requirements are put forward for the preparation of tungsten, tungsten alloys and tungsten compounds. Tungstate is an important intermediate material in tungsten smelting, and its preparation and technological research have important value and significance.

Photocatalysis can effectively convert light energy into chemical energy. Bi₂WO₆, as a new visible light-responsive photocatalytic material, has a narrow band gap (2.7eV), good photocatalytic activity under ultraviolet and visible light, and can effectively degrade organic pollutants in wastewater.

In the field of industrial production, metal wear is one of the main causes of failure of mechanical parts, such as material conveying systems in metallurgy, coal, power, waterway dredging and other industries, parts wear very seriously. Wear not only causes great loss of materials, but also causes the shutdown of production and affects the normal operation of production line. Therefore, the research and development of high wear resistant materials has been paid attention by material workers.

The thin tungsten sheet used for X-ray shielding material of CT machine is a high precision material with thickness of 0.1-0.2 mm and dimension tolerance of <0.01 mm. At present, the thickness tolerance of ultra-thin and high-precision tungsten sheet used for the collimator shade plate, the core component of CT machine, must reach (+5%) in order to ensure the stability of X-ray signals detected and obtain high-resolution images. How to make the tungsten sheet deform uniformly in hot working, and the surface is easy to handle, without causing surface indentation is the core issue to ensure tolerance. The choice of lubricating materials and methods is very important.

Heteropoly acids are metal oxygen clusters formed by bridging metal atoms with oxygen atoms. Heteropoly acid has good catalytic performance and is an efficient bifunctional catalyst. It has not only acid catalytic performance, but also redox catalytic performance. Heteropoly acid has stable structure and can be used in homogeneous or heterogeneous catalytic environment. It can also be used together with phase transfer catalyst. It has no pollution to the environment and little corrosiveness to equipment. It is a promising green catalyst.

Nickel tungsten oxide has been proved to be able to be used as an anode or ion storage layer in electrochromic devices. Nickel exists in nickel-tungsten oxide thin films in the form of positive bivalent and positive trivalent. Increasing the content of positive trivalent nickel ion is beneficial to improving the discoloration range and ion storage capacity of the thin films, thereby improving the performance of electrochromic devices.

Recently, it was reported that a child in the Xiaolan station of the Guangzhou-Zhuhai intercity had not paid attention to drilling into the security inspection machine. The security personnel who saw this situation immediately stopped after the discovery and directed the child to climb out from the exit.

The Boeing 787 "dream window" does not have a visor, but it can change the transparency, and the effect of this is the same - tungsten oxide electrochromic film.

The porthole of the Boeing 787 has no visor, but it can change the transparency! You only need to press the button; the porthole will become a "chameleon" until it is completely darkened! Of course, the captain can also dim directly from the cockpit when the night falls. In addition, because the color change process of this "electronic curtain" is gradual, you don't have to worry about the eyes being uncomfortable. What's more, when an unexpected power outage occurs, the portholes become completely transparent and comply with relevant aviation standards. At this point, some readers may ask, "So, can you easily put the Boeing 787 'magic window' home?" This just seems impossible. In fact, only need - the tungsten oxide electrochromic film black technology can give you Boeing 787 enjoy.

The tire stud on the snowy road surface includes a flange on the cylindrical nail body at the head of the core, the wing portion at the middle portion, and the lower end portion, and the wing portion and the flange form an acute angle with the nail body. When the stud is used, it is inserted into the tire tread, which is not only easy to install, but also has an anti-shedding effect. Depending on the application and the groove type, the specifications have different requirements, but the material requirements are: wear resistance, low temperature resistance, high hardness and so on.