Silicon CAS#7440-21-3

1, high-purity monocrystalline silicon is an important semiconductor material. Trace amounts of group IIIA elements are incorporated into monocrystalline silicon to form p-type silicon semiconductors; Trace amounts of VA group elements are incorporated to form n-type semiconductors. P-type semiconductors and n-type semiconductors combine to form p-n junctions, which can be made into solar cells and convert radiant energy into electrical energy. It is a promising material in the development of energy. Besides, used diodes, transistors, thyristors, field effect transistors and various integrated circuits (including chips and CPUs in people’s computers) are raw materials made of silicon.
2. Cermet and important materials for spaceflight. The ceramic and metal are mixed and sintered to make a cermet composite material, which is resistant to high temperature, rich in toughness, and can be cut, which not only inherits the respective advantages of metal and ceramic, but also makes up for the innate defects of both. It can be applied to the manufacture of military weapons. The first space shuttle, Columbia, was able to withstand the high temperatures of friction as it traveled through the dense atmosphere at high speeds, thanks to its 31,000-piece silicon tile shell.3, optical fiber communication, the latest modern means of communication. Pure silicon dioxide can be drawn to produce transparent glass fibers. The laser can be transmitted forward in countless total reflections in the path of the fiberglass, replacing the bulky cable. Optical fiber communication capacity is high, a hair as thin as a glass fiber, can send 256 telephones at the same time; Moreover, it is not disturbed by electricity and magnetism, is not afraid of eavesdropping, and has a high degree of confidentiality. Optical fiber communication will revolutionize human life in the 21st century.
4. Silicon organic compounds with excellent performance. Silicone plastics, for example, are excellent waterproof coating materials. Spraying silicone on the four walls of the underground railway can solve the problem of water leakage once and for all. On the appearance of ancient cultural relics and sculptures, coating a thin layer of silicone plastic can prevent the growth of moss, resist wind and rain and weathering. The Monument to the People’s Heroes in Tiananmen Square is made of silicone plastic treatment, so it is always white and fresh.