Silicon metal, also known as crystalline silicon or industrial silicon, is an important basic industrial raw material. The following is a detailed introduction to silicon metal products:
1. Main ingredients and preparation
Main ingredients: The main component of silicon metal is silicon, which is usually as high as about 98%. The silicon content of some high-quality silicon metal can reach 99.99%. The remaining impurities mainly include iron, aluminum, calcium and other elements.
Preparation method: silicon metal is smelted by quartz and coke in an electric furnace. During the smelting process, the silicon dioxide in the quartz is reduced to silicon and reacts with the carbon element in the coke to produce by-products such as silicon metal and carbon monoxide.
2. Physical properties
Appearance: silicon metal usually appears as a dark gray or blue-toned crystal with a relatively smooth surface.
Density: The density of silicon metal is 2.34g/cm³.
Melting point: The melting point of silicon metal is 1420℃.
Conductivity: The conductivity of silicon metal is closely related to its temperature. As the temperature rises, the conductivity increases, reaching a maximum at around 1480°C, and then decreases as the temperature exceeds 1600°C.
3. Chemical properties
Semiconductor properties: silicon metal has semiconductor properties and is an important component of semiconductor materials.
Reaction characteristics: At room temperature, silicon metal is insoluble in acid, but easily soluble in alkali.
4. Application fields
Semiconductor industry: silicon meta is widely used in the semiconductor industry and is a key material for manufacturing integrated circuits, solar panels, LEDs and other electronic devices. Its high purity and good electronic properties make it an important component of semiconductor materials.
Metallurgical industry: In the metallurgical industry, metallic silicon is an important alloy raw material. It can be added to steel to improve the hardness, strength and wear resistance of steel and improve its physical and chemical properties. At the same time, metallic silicon is also a good component in aluminum alloys, and most cast aluminum alloys contain silicon.
Foundry industry: Metallic silicon can be used as a casting material to improve the toughness and thermal fatigue resistance of castings and reduce casting defects and deformation.
Solar thermal power generation: Metallic silicon is also used in solar thermal power generation. By focusing solar energy on the surface of metallic silicon, light energy can be converted into heat energy, and then the heat energy is used to generate steam to drive turbine generators to generate electricity.
Other fields: In addition, metallic silicon can also be used to manufacture silicone products such as silicone oil, silicone rubber, silane coupling agent, and for the production of photovoltaic materials such as polycrystalline silicon. At the same time, metallic silicon powder is also widely used in refractory materials, powder metallurgy industry and other fields.
5. Market and Trends
Market demand: With the development of the global economy and the advancement of science and technology, the demand for metal silicon continues to increase. Especially in the semiconductor industry, metallurgical industry and solar energy fields, the market demand for metal silicon shows a strong growth momentum.
Development trend: In the future, metal silicon products will develop in the direction of higher purity, larger scale and lower cost. At the same time, with the rapid development of the new energy industry, the application of metal silicon in the field of photovoltaic materials will also be further expanded.
In summary, as an important basic industrial raw material, metal silicon has broad application prospects in many fields. With the advancement of science and technology and the increase in market demand, metal silicon products will continue to be improved and innovated, making greater contributions to the development of human society.
Post time: Oct-28-2024
