Tungsten Oxide

Nano tungsten oxide is considered to be one of the most promising new oxides gas sensing materials that detects nitrogen oxides, hydrogen sulfide, and acetone and other harmful gases. The preparation methods of nano tungsten oxide mainly include hydrothermal method, sputtering method, sol gel method and gas phase deposition method. Compared with other synthetic methods, as a new method for composing nano-materials, low heating solid phase chemical reaction has the characteristics of simple operation, friendly environment and mild conditions.  Mix sodium tungstate and sodium sulfate for 30min, the sample was placed in a cone bottle and placed for 24h to obtain the precursor. Then put the precursor calcined at 600°C in the muffle furnace 2h, nano tungsten carbide was obtained.  Based on the product of nano tungsten carbide test, the material in the lower working temperature of low concentration acetone gas showed the performance of fast response, high selectivity and high sensi...

The reason why semiconductor memory chooses nano tungsten oxide material to produce storage media is that it is a very important semiconductor material with good electrochemical performance, and its resistance value can undergo reversible transformation under the action of an electric field. Next, let's take a look at the manufacturing method of a storage device based on a tungsten oxide storage element. Manufacturing method (1) The storage device includes a plug that extends upward from the top surface of the substrate through a dielectric layer. A bottom electrode, the outer surface of the bottom electrode has tungsten, the bottom electrode extends upward from the top surface of the plug. An insulating material, the insulating material surrounds the bottom electrode is in contact with tungsten on the outer surface of the bottom electrode. The storage element is located on the upper surface of the bottom electrode, the storage element includes a tungsten oxide compound, and the s...

With the vigorous development of the new energy vehicle industry, the demand for power lithium-ion battery continues to heat up, causing many lithium-ion battery materials to face supply shortages. Many people in the industry said that whoever has the upstream lithium resources, nickel resources and cobalt resources will have the initiative to develop power batteries. In view of the above situation, perhaps tungsten resources can effectively alleviate it. It is reported that in recent years, energy storage scientists have developed a lithium-ion battery using nano tungsten oxide as the electrode material, which has good physical and chemical stability, strong endurance and the advantage of civilian prices, mainly because of the oxidation tungsten powder is easy to prepare and has relatively new photoelectric properties. In addition, China is the country with the most abundant tungsten resources in the world, distributed in 23 provinces and autonomous regions, and its output rank...

At present, the spreading of COVID-19 is furious in the world. Several previous difficult viruses (such as HIV, HBV, PIV, etc.) have not yet been attacked, and new mutant viruses (such as SARS coronavirus, avian influenza virus, and H1N1 influenza virus, etc.) have appeared in humans, seriously affecting human health.  Many viruses, such as influenza virus, SARS coronavirus, avian influenza virus, and human immunodeficiency virus, are difficult to control. The main reason is that these viruses are infected on the mucosal surface, the antigenicity is weak, and antigenic mutations and drug resistance mutations are prone to occur. This has led to poor clinical prevention or treatment of these viruses. The detection, prevention and treatment of infectious diseases are difficult problems in the medical field. At present, the control of viral infectious diseases is mainly vaccine prevention, but there is no effective treatment strategy for established viral infections. However, ...

As one of the most hot topics recently, cobalt-free lithium ion battery is considered as an upgraded version of the current commercial ternary lithium ion battery. Because of their higher energy density and lower production costs, they are popular among many battery manufacturers. As a typical transition metal N-type semiconductor material, how should nano tungsten oxide be used in cobalt-free lithium battery? Nano tungsten oxide can be used as a modifier for the anode material of cobalt-free batteries, and can also be used to produce high-performance anode materials. In terms of cathode materials, the use of WO3 can not only reduce the use of cobalt metal, but also effectively improve the specific capacity and thermal stability of the product. In terms of anode materials, the use of WO3 can significantly improve the rate performance and lithium storage kinetics. As we all know, the biggest cost of new energy vehicles lies in power batteries. As far as the ternary lithium ...