Our scientists take a key step in the actual application of high -pressure materials

Our newspaper, Beijing, August 17th (Reporter Yuan Yufei) Recently, the international research team led by Researcher Zeng Qiashi, a Beijing High -pressure Science Research Center invented a common "diamond nano -cockpit" composite material. It can achieve permanent sealing of the high pressure state of the material. This breakthrough has taken a key step for the actual application of high -pressure materials. This major innovation achievement was published in the international academic journal "Nature" on August 17. Zeng Qiaoshi said: "In addition to gases, the concept of 'diamond nano -high -voltage cockpit' can also be applied to the initial target materials of various forms. In the later research, we will try to seal solid materials, such as high temperature superconductors. The excellent nature of materials is no longer limited to the basic research of the laboratory, but can be widely used in daily life like constant pressure materials. "

According to reports, materials are the cornerstone of modern technology. Therefore, the advancement and innovation of science and technology often depend on the development of advanced materials with new and special performance. For specific materials, you only need to change the pressure it items to be affected, which can often significantly change its nature, thereby providing broad space and possibilities for exploration and optimization and even new material performance. However, it is regrettable that most of the excellent properties found under high pressure can only exist under high pressure. Therefore, the sturdy thick pressure device required to produce and maintain stress has become an insurmountable barrier between high -pressure materials and actual applications. In the past century, scientists have continued to make various efforts to try to overcome this difficulty. They widely researched different material systems and found that a special type of high -voltage synthetic sub -stable material can be retained to normal pressure after desertation. Typical examples are that diamonds synthesized by ordinary carbon materials under high pressure can still exist under normal pressure after external pressure, and maintain its shiny appearance and various excellent properties. Unfortunately, there are very few lucky examples. Therefore, high -pressure substances are more important objects to carry out basic research in the laboratory, but they rarely enter industrial applications on a large scale, playing a wide range of role in people's daily life.

The cooperative research team of the Beijing High -pressure Science Research Center and Stanford University and the National Laboratory of Agan in the United States invented a new method. Using this method, they successfully retained the extreme high -voltage and its properties of the difficult to restrained gas to the normal pressure environment. They first pressed a high -pressure state of about 50 Gap (500,000 atmospheric pressure) with a carbon material called "glass carbon" and puzzled the nano -empty carbon material and gaspigs, and then heated the glass carbon to about 1800 degrees Celsius. Glass carbon under normal pressure is a material with good gas tightness. However, they find that under high pressure, glass carbon can absorb the pyrophopia as a sponge to absorb water and store it in its nano -empty hole. High -pressure and high temperature can promote high -pressure glass carbon to transform into natural and hardest substances -diamond. Then, when the pressure and temperature are removed, and the sample is removed from the pressure device, it is unexpected that the diamond sample in the normal pressure environment is permanently sealed in a large number of nano pores containing a very high stress state, forming a type of In the diamond matrix, a large amount of high -voltage nanochroma particles are embedded in the "Vajrayana High Compartment". Experiments show that the pressure in these cricket particles is as high as 22 Gapa, which is about 220 times the pressure of the bottom of the Mariana Trench at the earth's most ocean. In this composite material, the thickness of the diamonds with high -voltage pillar particles only requires dozens of nanometers. Therefore, there is no barrier to the traditional thick and high -pressure cavity. Most of the modern material research and detection methods that require the work of modern materials in normal pressure or vacuum environment, such as electronic microscopes, can directly detect and study it. Using diamond nano -high -pressure cockpit, high -pressure materials can have the "approachable" normal pressure appearance, but retains the excellent performance of high -pressure inner and under high pressure.

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