As a new type of wastewater treatment technology, photocatalysis has attracted the attention of researchers with its remarkable advantages of completely mineralizing organic pollutants. Photocatalyst is also widely used in the building decoration market and indoor vehicles. The photocatalytic process has almost no limitation for the degradation of organic matter, can completely mineralize organic pollutants, no secondary pollution, simple equipment, low investment, good effect, etc.  advantage.

The composite material prepared by the composite powder obtained by uniformly doping the metal-based particles with the nano ceramic powder not only has excellent toughness, thermal conductivity and the like of the metal, but also has high temperature resistance, wear resistance and corrosion resistance of the ceramic, and high hardness and highness. Chemical stability and other characteristics.

As resistance welding, the electrode is a very critical material, which must withstand ablation during the welding process and avoid welding with the welding material. Therefore, the requirements for the electrode material are also very high. To withstand high temperature ablation, a high melting point is first required. In the metal material, the melting point of tungsten is the highest (up to 3400 °C), and its electrical properties are also very good. Therefore, tungsten is often chosen as the electrode material.

There are a large number of processes in industrial production that require water to cool. With the continuous development of social urbanization and industrial production, water resources are becoming more and more tense. In order to save water, the concentration of the industrial circulating water cooling system is continuously increased, reaching more than 4 times.

With the declining oil resources, the production of crude oil has become heavy and inferior. Refining and chemical enterprises are faced with the problem of light weight of domestically produced inferior heavy oil and imported inferior heavy oil. At the same time, along with increasingly stringent environmental requirements, it is important to control the quality of steam and diesel to meet the production of clean fuels.

At present, with the rapid development of industrial technology, the water resources on which humans depend for survival are polluted to varying degrees. Water pollution has become an urgent problem for all countries in the world. The presence of pollutants in water, especially toxic organic pollutants, not only causes environmental pollution, ecological damage, but also seriously endangers human health. These organic pollutants include polycyclic aromatic hydrocarbons, polychlorinated biphenyls, pesticides, environmental interferons, dyes, and the like.

Tungsten is a high melting point rare metal or refractory rare metal in the field of metallurgy and metal materials. It is an important strategic reserve resource for the country. Tungsten is one of the most important functional materials in modern industrial, national defense and high-tech applications. The hard alloy made of tungsten is known as “industrial teeth”. Although China's current strength in the field of high-end alloys still lags behind that of developed countries, after years of hard work, R&D strength has been continuously improved. This article mainly introduces a female scholar who has been studying tungsten tungsten alloy for more than 20 years, Professor Fan Jinglian, director of the Institute of Refractory Metals and Cemented Carbides, Institute of Powder Metallurgy, Central South University.

Coarse-crystalline tungsten carbide (WC) can improve the impact toughness of cemented carbide, so coarse-grained and ultra-coarse-tungsten carbide hard alloys are widely used in petroleum drills, stamping dies, mining tools and other fields.

Tungsten carbide (WC) is an important type of cemented carbide. It is widely used in modern tool materials, wear-resistant, corrosion-resistant and high-temperature resistant materials. It is known as the teeth of modern industry.

With the increasing energy crisis in the world, it has become an urgent task to seek new and environmentally friendly energy sources.  The use of solar photocatalytic decomposition of water to produce hydrogen or oxygen is one of the effective ways to solve the problem of energy shortage and environmental pollution.  Among semiconductor photocatalysts such as TiO2, Nb2O5, ZnO and WO3, tungsten trioxide WO3 has received much attention as a typical n-type semiconductor photocatalyst.