Tungsten disulfide is a typical transition metal chalcogenide. It belongs to hexagonal crystal system. It has a strong S-W-S covalent bond in the layer and a weak van der Waals force between the layers. The thickness of the single layer is about 0.65 nm. Monolayer tungsten disulfide nanosheets can be obtained by stripping or lithium ion intercalation.

At present, the self-developed ion exchange process is widely used in the production of ammonium paratungstate (APT) in China. Its advantages are stable product quality and easy operation. However, the major disadvantage of this process is that it uses a large amount of water and consumes more than 100 tons of water per ton of APT production. Therefore, the treatment of smelting wastewater is a very headache.

Powder injection moulding (PIM) is a new near net-size forming technology developed by combining traditional powder metallurgy with modern plastic injection moulding technology. The most important feature of PIM is that it can directly produce parts with the final shape, minimize the amount of machining and save raw materials, and has wide material adaptability. It has been widely used in the preparation of ceramics and refractory metals.

High-energy ignition gas discharge tube is mainly used for high-energy igniter, as a switch to control high-energy, mainly used in military aerospace, airborne, missile-borne engine igniter, also can be used in civil ships, boilers, oil fields and other ignition systems. In military high-energy ignition gas discharge tube technology, China has been banned and blocked by western countries for a long time, and can only rely on independent research and development.

In the solar spectrum distribution, ultraviolet light accounts for 5% of the total solar energy. Among them, titanium dioxide is the most typical ultraviolet photocatalyst, but its light absorption is limited to the ultraviolet region. Visible light energy accounts for 48% of the solar spectrum. Bismuth tungstate, bismuth molybdate and other visible photocatalysts have also been widely studied.

When it comes to golf, the familiar people can say that the meanings and professional skills of "Birdie", "Eagle" and "Double Eagle" are handy; for the master, they will play a straight one shot. Applying an old saying, that is, for the general, when the "green" battlefield is galloped, the four major slams will be collected. For the above, when the pride is not reduced, after a few years, you can still "laugh". However, what is the relationship between this and the tungsten alloy counterweight? What is the connection between golf clubs and tungsten alloy weights? Do not worry, and listen to the author.

It is well known that tungsten (W) is the purest metal with the highest melting point in the world (meaning it is the most difficult to melt), and its melting point is 3156.85 Kelvin (3430 ° C). At present, the most refractory material in the world is a powder mixture of bismuth-containing carbides and nitrides, which has a melting point of 4400 Kelvin (4126.85 ° C). This was synthesized a few days ago by Russian Far Eastern Federal University and the Far Eastern Branch of the Russian Academy of Sciences under extreme conditions. This high-temperature functional material will be mainly used in cutting-edge fields such as national defense, aerospace, electronic information, energy, chemical, metallurgical and nuclear industries, and has a good application prospect. According to the news released by the Russian Far Eastern Federal University, the next step in the research is to optimize the synthesis of the material and to study the solid phase transition process. Prior to this, the world's most refractory material was the five-carbon tetrakis (Ta4HfC5), which had a melting point of 4,200 Kelvin (3926.85 ° C).

Technology products such as smartphones, electric cars, big-screen TVs, and green energy power generation rely on a range of chemical elements that most people have never heard of. Until the end of the 20th century, people were only curious about these high-tech products. But nowadays, I feel that it is uncomfortable to find out which one is missing. This also reflects from the side that these chemical elements are indispensable. Because, in fact, a single mobile phone contains more than one-third of the elements in the periodic table.

The Boeing 787 "Dream Window" does not have a visor, but it can change the transmittance. What is similar to this is the 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 people may ask, "So, can you easily put the Boeing 787 'Magic Window' home?" This just seems impossible. In fact, only need to - tungsten oxide electrochromic film, this black technology can give you Boeing 787 enjoy!

In today's rapid development of the IT industry, the chip can be described as the brain of various data analysis, is the core! Now, for high-purity sputtering targets, the highest-end application area is the field of ultra-large-scale integrated circuit chip manufacturing, which is actually a field of semiconductor chips, and also occupies a large market share. Moreover, the market capacity of semiconductor chips in the future will be further enhanced with the continuous growth of semiconductor chip demand in the terminal consumer field such as automobiles.