[Chemical Knowledge]：Properties, uses, upstream and downstream raw materials, storage methods, main uses of silicon micropowder

THE PROPERTIES OF SILICON POWDER

Silica powder is an ultrafine powder prepared by high-temperature melting, cooling, crushing, grading and other processes of silica ore, and its main component is silica (SiO2). Silicon powder has the characteristics of small particle size, large specific surface area, high purity and good chemical stability, and still maintains its physical and chemical properties at high temperatures. These properties make it widely used in many fields.

The particle size of silicon powder is usually between several microns and tens of microns, and can even reach the nanometer level. Its specific surface area is usually 10-30 m²/g, which makes it have a strong adsorption capacity. High-purity silicon powder is particularly important in high-tech fields such as electronics and semiconductors, because these fields have strict requirements on impurity content. In terms of chemical stability, silica powder is not easy to react with acid and alkali, which makes it stable in harsh environments.

Silicon powder use

Silicon powder is widely used in industry. In the electronics and semiconductor industries, silicon micropowder is used to manufacture high-performance electronic components and integrated circuits, and its high purity and good electrical insulation properties are key factors. In coatings and inks, silicon powder as a filler can improve the wear resistance, weather resistance and surface finish of the product.

In the rubber and plastics industry, silicon powder is used as a reinforcing filler, which can improve the mechanical properties and heat resistance of the material. In building materials, silica powder is used as an additive for concrete and cement, which can increase the strength and durability of the material. Silicon powder is also used in ceramics, glass, optical fiber and other fields as a reinforcing agent and stabilizer to improve the quality and performance of products.

Upstream raw materials

The main upstream raw material of silicon powder is high purity silicon ore. Silicon ore is widely distributed in the earth's crust, but to prepare high-quality silicon powder, it is necessary to select quartz ore with high purity and less impurities. The production process also requires a large amount of energy, such as electricity and heat, because the silica ore needs to be melted to remove impurities and form a pure silica powder.

The process equipment for the production of silicon powder is also very important, such as high temperature furnace, crusher, classifier and so on. These devices require high precision and efficiency to ensure a uniform particle size distribution and high purity of the product. Throughout the production process, strict quality control and monitoring are essential to ensure that the final product meets the expected specifications and performance requirements.

Downstream Products

As an important functional material, the downstream products of silicon powder are involved in many fields. Chips and integrated circuits in the electronics industry are its main application products. These products require high-purity and high-performance silicon micropowder as a substrate. In coatings and inks, silicon powder is used as a filler to improve the physical and chemical properties of products, and is widely used in construction, automobile, packaging and other industries.

In rubber and plastic products, silica powder is used as a reinforcing material to improve the mechanical properties and service life of the product. High-performance concrete and cement in the construction industry are also important application areas for silica fume, and these products play a key role in infrastructure construction. Other downstream products include ceramics, glass, optical fibers, etc., which rely on the excellent properties of silicon powder to improve its quality and function.

Silicon powder storage method

The storage of silicon micropowder requires special attention to environmental conditions to maintain its excellent properties. Silica powder should be stored in a dry, well-ventilated environment to avoid moisture and oxidation. The wet environment will cause the agglomeration of silicon powder, which will affect its dispersion and use effect.

Silicon powder should avoid contact with chemical substances such as acid and alkali, because although silicon powder has good chemical stability, long-term contact with these substances may lead to performance degradation. During storage, the use of moisture-proof and anti-static packaging materials, such as plastic bags or sealed containers, is an important measure to ensure its quality.

Silica powder should be kept away from fire source and high temperature environment to avoid changes in physical properties caused by high temperature. Regularly checking the humidity and temperature of the storage environment, and making records and monitoring, is the key to maintaining the long-term stability of silicon powder.

Conclusion

As a functional material with broad application prospects, silica powder has been widely used in many fields due to its excellent physical and chemical properties. From the upstream high-purity silicon ore to the downstream electronic components, coatings, rubber products, etc., silicon powder runs through a number of industrial chains. In the process of storage and use, strict environmental control and quality monitoring are important means to ensure its performance. In the future, with the advancement of science and technology and the expansion of application fields, the market demand for silicon powder will continue to grow, and its application prospects will be broader.