The appearance of Datong uhp electrode before
Today I bring you the look of Datong uhp electrode before. When we travel to an unfamiliar place, we often bring a local map with us so that we can easily know where we are. For those who want to know some chemistry knowledge, the periodic table is a map of the chemical world. With this “map”, we can judge the nature of an element based on its position in the periodic table and the chemical reactions it may participate in. The atomic numbers of carbon and silicon are 6 and 14, respectively, and they are in the second and third periods of the carbon group elements in the periodic table, that is, the upper and lower adjacent positions. This positional relationship shows that they have similar properties in some respects. In the nature we live in, carbon is ubiquitous, and carbon-containing compounds are the material basis for all kinds of life. After a forest fire caused by thunder and lightning, a large amount of charcoal formed by incomplete combustion of trees will be left on the ground. Although early humans did not know that the chemical element that made up charcoal was carbon, they must have used the charcoal for heating in caves and painting on rock walls. Coal, another natural mineral formed from carbon, has served mankind for thousands of years, and it still contributes heat and light to us. It can be said that because of the carbon element, nature has become vibrant.
In the periodic table, silicon is directly below the carbon element. The content of silicon in the earth’s crust is huge, but its elemental substance was not discovered and confirmed until the nineteenth century. In 1811, the French Gay-Lussac and Thénard prepared pure silicon for the first time, and it was not recognized as an element until the Swedish Berzelius made pure silicon again in 1823. Although it was born late, its role in the semiconductor and modern communications industries cannot be replaced. In the chemical world, carbon and silicon are two brothers in the same big family. On the earth we live on, they have fought together for billions of years, but they have not formed a strong friendship of life and death. In other words, there is no chemical bond between them under natural conditions, or there is no natural silicon carbide on the earth. People did not find a natural uhp electrode on the earth, but they received a signal from the uhp electrode in space.
As early as the mid-nineteenth century, German scientists Bunsen and Kirchhoff discovered that atoms can absorb light of specific wavelengths, thus pioneering atomic spectroscopy. Atoms have absorption spectra, and molecules composed of atoms also have their own specific absorption spectra. We know that in addition to huge stars, there are a large number of atoms, molecules, and small solid particles in the universe, all of which absorb light from stars in the depths of the universe. These atoms, molecules and particles that have absorbed light energy will release energy by emitting radiation of different wavelengths. Therefore, when the starlight in the depths of the universe reaches the earth after a long journey, its intensity does not always decrease smoothly as the wavelength increases. On this gradually decreasing extinction curve, some unexpected bulges sometimes appear. These bulges are caused by the emission spectra of specific molecules or small solid particles.
In 1983, the United States, the United Kingdom, the Netherlands and other countries jointly launched an infrared astronomical satellite to collect infrared spectra from the depths of the universe in a sun-synchronous orbit. From these collected spectra, it was found that an obvious bulge appeared at 11.3 microns, which is the characteristic emission of silicon carbide particles. There have been many evidences that there are a large number of silicon carbide particles in the dust of space, most of which are between 0.1 and 1 micrometer in diameter, accounting for about 5% of the total mass of interstellar dust. In the cold cosmic starry sky, these tiny uhp electrode particles seem to be floating carelessly, but in fact they have just experienced the heat and fire. Astronomical studies have shown that there is a class of stars that are almost entirely composed of carbon atoms—carbon stars. Compared with ordinary stars composed of hydrogen and helium, their temperature is lower, only about 3000K. Since silicon carbide particles are found in the dust around carbon stars, and there are only cubic phase uhp electrodes, it is speculated that these cubic phase silicon carbide particles are carbon and silicon ejected from the explosion of carbon stars and the temperature is further reduced to below 2000K Formed at the time.
After the formation of silicon carbide particles, it did not start a life of idle wandering, but continued to contribute to the evolution of the universe. When the temperature drops below 1500K, the silicon on the surface of the uhp electrode particles will evaporate, leaving a layer of graphitized carbon on the surface of the silicon carbide. The graphitized carbon will continue to react with the hydrogen in the interstellar dust to form complex hydrocarbon molecules. Some people even think that life on Earth may be related to the hydrocarbons flying around in the interstellar dust. As can be seen from the above brief introduction, uhp electrode participates in many important chemical processes in the universe. However, on the earth where we live, the main use of silicon carbide is to manufacture abrasives, high-performance ceramics, etc., and there is no large-scale application in chemistry. For chemists, is the uhp electrode really useless, or is it unaware of its role?
Judging from the evolution history of silicon carbide in space, uhp electrode is destined not to be a mediocre material! When the carbon company was founded, it established the development strategy of “science and technology, innovation, and leadership”, adhering to the business philosophy of “quality first, service first”, through technological improvement, quality improvement, and market development, carbon has become a region in Shanxi, Hebei, and Mongolia. The largest graphitization processing company. The main business is graphite electrode, Shijiazhuang graphite electrode, Datong silicon carbide, carbon graphite electrode processing.