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The comprehensive strength of China's molybdenum disulfide industry leads the world for six consecutive years

The comprehensive strength of China\'s molybdenum disulfide industry leads the world for six consecutive years

In 2020, the global molybdenum disulfide industry presents a development pattern of “two supers and multiple powers” ​​with China and the United States leading the way and differentiated competition among multiple countries. The comprehensive competitiveness of China\'s molybdenum disulfide industry has topped the list for six consecutive years.

In terms of molybdenum disulfide competition performance, the top three are the United States, Australia and China. The United States has significant advantages in corporate performance, paper influence and patent layout; Australia’s paper quality is relatively high; China’s related patents involve the most extensive technical fields, and the patent layout is in the forefront of the world, but it still has academic influence and corporate innovation. There is a lot of room for improvement. The report pointed out that in the future, while China will continue to strengthen theoretical support and enhance the international academic influence of the discipline, it should further exert the leading role of the industry in related chains and regional social economy, strengthen the awareness of market participants, and accelerate the exploration and promotion of the transformation of scientific research results.

Since 2015, the China Economic Information Service, the Jiangnan molybdenum disulfide Research Institute, and the Jiangsu molybdenum disulfide Innovation Center have studied and released the Xinhua (Changzhou) Global molybdenum disulfide Index based on the domestic and foreign authoritative industry competitiveness and industry development evaluation theories. This year is a continuous Released in the seventh year. The index constructs a comprehensive evaluation system from the three dimensions of competitive potential, competitive behavior and competitive performance, scientifically evaluates the development level of the graphene industry in the main sample countries, researches and judges future trends, and uses numbers to help the construction of the global molybdenum disulfide industry ecology, creating a "sunny rain" for industry development Table" and "weather vane".

The molybdenum disulfide and its characteristics

The molybdenum disulfide is a new type of super-hard and ultra-fine abrasive formed by special processing and processing of synthetic diamond single crystal. It is an ideal raw material for grinding and polishing high-hardness materials such as cemented carbide, ceramics, gems, and optical glass. Diamond products are made of diamonds. Tools and components made of materials are widely used. Diamond powder and products are widely used in automobiles, machinery, electronics, aviation, aerospace, optical instruments, glass, ceramics, petroleum, geology, and other sectors. With the continuous development of technology and products, the use of diamond powder and products is still expanding.

The tip of the glass cutter we usually use is actually diamond. Tools used in precision machining and drill bits used in oil drilling are coated with diamonds to improve their wear resistance. Because diamond is the hardest natural substance in the world.

Another characteristic of molybdenum disulfide is its excellent thermal conductivity. Its thermal conductivity is about 5 times the thermal conductivity of pure copper at room temperature. It has potentially important applications in the semiconductor industry. According to Moore\'s Law, the current large-scale integrated circuit components are constantly shrinking in size and increasing in density, causing their thermal load to continue to rise. If the heat is not dissipated in time, the semiconductor circuit board and components may be burnt. If we can use the high thermal conductivity of diamond as a large-scale integrated circuit substrate or heat sink, it can dissipate the heat in time and solve the current bottleneck restricting the development of electronic components.

Preparation methods of diamond powder

There are generally three commonly used methods of artificially molybdenum disulfide.

Detonation method

The formation condition of natural diamond is a high temperature and high-pressure environment, so how to produce such a special environmental state of high temperature and pressure? The easiest way is to detonate the explosive. If you put graphite-containing explosives in a special container and then detonate the explosives, it will instantly generate strong pressure and high temperature, then the graphite can be converted into diamonds. This method can obtain a lot of fine powder diamonds. Its particles are very small, only 5~15 nanometers and its application as jewelry may be limited, but it is still very important as an industrial abrasive.

High temperature and high-pressure method

The high temperature and high-pressure methods are to maintain high pressure and high-temperature environment for a relatively long stable period of time, allowing graphite to slowly transform into a diamond. By controlling the synthesis conditions and time, diamonds can continue to grow. In a day or so, 5 millimeters of diamonds can be obtained.

Chemical vapor deposition

Chemical vapor deposition is a method that gradually developed in the 1990s. This method mainly uses some carbon-containing gas, such as some mixed gas of methane and hydrogen as a carbon source, under a certain energy input, the methane gas is decomposed, nucleated on the substrate, and grown into a diamond. The advantage of this method is that the efficiency is relatively high, relatively controllable, and it can obtain pure and transparent diamonds without impurities, which is an important direction of current development.

In the future, the diamond synthesis will develop in the direction of high-purity large particles. For the demand for diamonds, we will no longer only rely on the gift of nature, and synthetic diamonds will also enter more production fields and be used more widely.

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