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What are the Uses of Silicon Metal and Silicon Metal Powder?

Silicon metal, also known as crystalline silicon or industrial silicon, is a product smelted from quartz and coke in an electric furnace. Its main component is silicon, with a content of about 98%, and the remaining impurities are iron, aluminum, calcium, etc. The properties of silicon metal are similar to those of germanium, lead, and tin. It has semiconductor properties, but it is insoluble in acid at room temperature and easily soluble in alkali.

Silicon Metal Appearance

The appearance of silicon metal is usually silver-gray crystalline, with a relatively smooth surface without roughness or bulges caused by oxidation products.

Silicon Metal Uses

Silicon metal has a wide range of uses, mainly in the following aspects:

1. Semiconductor industry: Metal silicon is an important component of semiconductor materials and is used to manufacture integrated circuits, solar panels, LEDs, and other electronic devices. Its high purity and good electronic properties are widely used in the electronics industry.

2. Steel smelting: In the metallurgical industry, silicon metal is an important alloy raw material. Adding appropriate amounts to steel can improve its hardness, strength, and wear resistance, and improve its physical and chemical properties.

3. Casting industry: silicon metal can be used as a casting material to improve the toughness and thermal fatigue resistance of castings and reduce casting defects and deformation.

4. Solar thermal power generation: Metal silicon is also used in solar thermal power generation. By focusing solar energy on the surface of metal silicon, the light energy is converted into thermal energy, and then the thermal energy is used to generate steam to drive a turbine generator to generate electricity.

5. Nanomaterial preparation: Through appropriate chemical reactions and processing methods, silicon metal can be converted into nanoparticles, nanowires, or nanofilms.

Silicon Metal Powder

Silicon metal powder is a kind of powdered silicon metal, which has the same composition as bulk silicon metal.

The appearance of silicon metal powder is a silver-gray or dark-gray powder with a metallic luster.

The particle size of silicon metal powder is usually between 10-100 microns. During the processing, due to different production processes and requirements, metal silicon powder of different particle sizes may be produced. Generally speaking, the larger the mesh number, the finer the material particle size; the smaller the mesh number, the larger the material particle size.

Silicon Metal Powder Processing

The particle size processing process of silicon metal powder includes the following steps:

1. Crushing: Crush the selected ore into particle sizes suitable for further processing.

2. Screening: Screen the crushed stones to separate particles of different sizes for further crushing and processing. The screening process can use a screening machine to carry out screening and classify particles according to prescribed standards to achieve the expected quality requirements.

3. Crushing: Particles of different sizes are fed into the crusher for crushing. There are many types of pulverizers to choose from, such as ball mills, Raymond mills, and ring roller mills, each with its advantages and disadvantages. Factors such as processing temperature and humidity need to be strictly controlled during the crushing process to ensure that the powder quality meets the expected requirements.

4. Drying: To ensure the dryness of the silicon powder, it needs to be dried. The drying process requires controlling parameters such as temperature and time to achieve the appropriate degree of drying.

5. Packaging: The dried silica powder can be packaged and stored. Packaging materials generally take the form of plastic bags, cardboard boxes, iron drums, etc. During the packaging process, attention must be paid to sealing and moisture-proof measures to ensure product quality.

Silicon Metal Powder Uses

Silicon metal powder is an important industrial raw material and is widely used in refractory materials, the powder metallurgy industry, and other fields.

1. In the refractory material industry, silicon metal powder can be used to make advanced refractory materials, such as siliceous refractory bricks, aluminum silicate refractory fibers, etc. These refractory materials have the advantages of high refractoriness, high strength, and high toughness, and are widely used as lining materials for high-temperature industrial kilns such as steel, cement, and nonferrous metals.

2. In the powder metallurgy industry: Metal silicon powder can be used to manufacture various high-performance alloy materials. For example, adding silicon metal powder to metals such as iron and nickel can significantly improve the hardness, wear resistance, and corrosion resistance of the alloy. In addition, silicon metal powder can also be used to manufacture various electronic devices, such as integrated circuits, solar panels, etc.

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