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.

How much more is the need for electrochromic materials to be used in large-scale commercial applications? This is a big proposition that requires us to have a certain understanding of the material before it is enough to think. So, let's take a rough look at the new materials that may be close to you and may be a little far away from you!

Nano-porous tungsten, which is characterized by large surface, numerous active spots and so on, is widely applied to a lot of fields, such as energy storage, catalysis and sensors. It can be categorized as a kind of powder metallurgy tungsten product which owns a inner structure with a lot of holes related to its application.

It is reported that graphene is gradually becoming a hot spot in the global scientific and technological community. According to experts, in addition to graphene, this two-dimensional material is gradually entering the field of science and technology.

In other words, what are the most popular words in your mind since the 21st century? Is there a place for 3D/3D? Although it is strange to separate them from specific applications, if you talk about 3D movies and 3D printing, you should not be unfamiliar. As we all know, in these areas, 3D means better visual effects, but also means higher technical level. However, for some areas, things are not like this, for example, two-dimensional materials.